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List of works by John P. Bilezikian

2008 Santa Fe Bone Symposium: update on osteoporosis

scientific article published in April 2009

2009 Santa Fe Bone symposium

scientific article published on January 2010

A clinician performance initiative to improve quality of care for patients with osteoporosis

scientific article published on 06 September 2013

A lifetime of hypercalcemia and hypercalciuria, finally explained

scientific article published on 13 January 2014

Alendronate in primary hyperparathyroidism: a double-blind, randomized, placebo-controlled trial

scientific article

Alendronate increases bone mass and reduces bone markers in postmenopausal African-American women

scientific article published in June 2002

Alendronate therapy in men with primary hyperparathyroidism

scientific article

American Association of Clinical Endocrinologists Medical Guidelines for Clinical Practice for the Diagnosis and Treatment of Postmenopausal Osteoporosis

scientific article published on November 1, 2010

American Association of Clinical Endocrinologists Medical Guidelines for Clinical Practice for the diagnosis and treatment of postmenopausal osteoporosis: executive summary of recommendations

scientific article published on November 2010

American Association of Clinical Endocrinologists medical guidelines for clinical practice for the prevention and treatment of postmenopausal osteoporosis: 2001 edition, with selected updates for 2003.

scientific article

Anabolic skeletal therapy for osteoporosis

scientific article published on August 2006

Anabolic therapy for osteoporosis.

scientific article

Application of high-resolution skeletal imaging to measurements of volumetric BMD and skeletal microarchitecture in Chinese-American and white women: explanation of a paradox

scientific article published on December 2009

Aromatase activity and bone homeostasis in men.

scientific article

Arterial stiffness in mild primary hyperparathyroidism

scientific article

Asymptomatic primary hyperparathyroidism

scientific article published on August 2006

Asymptomatic primary hyperparathyroidism: a commentary on the revised guidelines

scientific article

Asymptomatic primary hyperparathyroidism: a medical perspective

scientific article published on June 2004

Asymptomatic primary hyperparathyroidism: new issues and new questions--bridging the past with the future.

scientific article

BEYOND DXA: ADVANCES IN CLINICAL APPLICATIONS OF NEW BONE IMAGING TECHNOLOGY.

scientific article published on 23 May 2016

Benefits and risks of bisphosphonate therapy for osteoporosis

scientific article published on 20 April 2012

Better skeletal microstructure confers greater mechanical advantages in Chinese-American women versus white women

scientific article published on August 1, 2011

Bisphosphonates and osteonecrosis of the jaw: proceedings of an international conference

scientific article published on February 1, 2011

Bone Loss in the Intensive Care Unit

scientific article published in April 2016

Bone densitometry in asymptomatic primary hyperparathyroidism.

scientific article

Bone density in survivors of childhood cancer

scientific article

Bone markers and osteoporosis therapy

scientific article

Bone markers--new aspects.

scientific article

Bone mineral density and serum levels of 25 OH vitamin D in chronic users of antiepileptic drugs

scientific article published on 15 December 2004

Bone quality determined by Fourier transform infrared imaging analysis in mild primary hyperparathyroidism

scientific article published on July 2008

Bone strength in primary hyperparathyroidism

scientific article published on August 29, 2003

Cathepsin K: its skeletal actions and role as a therapeutic target in osteoporosis

scientific article published on June 14, 2011

Change in Undercarboxylated Osteocalcin Is Associated with Changes in Body Weight, Fat Mass, and Adiponectin: Parathyroid Hormone (1-84) or Alendronate Therapy in Postmenopausal Women with Osteoporosis (the PaTH Study)

scientific article published on October 12, 2011

Chronic glucocorticoid treatment alters spontaneous pulsatile parathyroid hormone secretory dynamics in human subjects

scientific article published in February 2005

Cinacalcet hydrochloride maintains long-term normocalcemia in patients with primary hyperparathyroidism

scientific article

Cinacalcet normalizes serum calcium in a double-blind randomized, placebo-controlled study in patients with primary hyperparathyroidism with contraindications to surgery

scientific article

Cinacalcet reduces serum calcium concentrations in patients with intractable primary hyperparathyroidism

scientific article published on 26 May 2009

Circulating Sclerostin in Disorders of Parathyroid Gland Function

scientific article published on September 21, 2011

Circulating sclerostin levels and markers of bone turnover in Chinese-American and white women

scientific article published on 13 September 2013

Clinical practice guidelines for multiple endocrine neoplasia type 1 (MEN1).

scientific article

Clinical practice. Asymptomatic primary hyperparathyroidism

scientific article published on April 2004

Clinical review 151: The role of parathyroid hormone in the pathogenesis of glucocorticoid-induced osteoporosis: a re-examination of the evidence

scientific article

Clinical review: Rare causes of hypercalcemia

scientific article

Clinical value of monitoring BMD in patients treated with bisphosphonates for osteoporosis

scientific article published in October 2009

Combination Anabolic and Antiresorptive Therapy for Osteoporosis

scientific article published on May 19, 2012

Combination anabolic and antiresorptive therapy for osteoporosis: opening the anabolic window

scientific article published on March 2008

Combination/sequential therapies for anabolic and antiresorptive skeletal agents for osteoporosis

scientific article

Commentary on silent renal stones in primary hyperparathyroidism: prevalence and clinical features

scientific article published on November 2014

Comparative effectiveness of combination osteoanabolic and antiresorptive therapy for osteoporosis: an update

scientific article

Congress Report: 5th Central and Eastern Europe (CEE) Summit on Osteoporosis in Bratislava, 2–3 December 2011

scientific article published on February 12, 2013

Consistency of Bone Turnover Marker and Calcium Responses to Parathyroid Hormone (1–84) Therapy in Postmenopausal Osteoporosis

scientific article published on November 20, 2010

Controversies in Vitamin D: Summary Statement from an International Conference

scientific article published on 01 February 2019

Current issues in the presentation of asymptomatic primary hyperparathyroidism: proceedings of the Fourth International Workshop

scientific article

Cystosarcoma phyllodes of the breast occurring in a child with subsequent diagnosis of celiac disease

scientific article published on 01 May 2003

Differences in bone microarchitecture between postmenopausal Chinese-American and white women

scientific article published on July 1, 2011

Differences in free estradiol and sex hormone-binding globulin in women with and without premenstrual dysphoric disorder

scientific article

Differentiation and proliferation of periosteal osteoblast progenitors are differentially regulated by estrogens and intermittent parathyroid hormone administration

scientific article published on 10 July 2008

Dynamic and structural properties of the skeleton in hypoparathyroidism

scientific article published on December 2008

Early responsiveness of women with osteoporosis to teriparatide after therapy with alendronate or risedronate

scientific article

Effect of renal function on skeletal health in primary hyperparathyroidism

scientific article published on 7 March 2012

Effects of Canagliflozin on Fracture Risk in Patients With Type 2 Diabetes Mellitus

scientific article

Effects of Intermittent Parathyroid Hormone Administration on Bone Mineralization Density in Iliac Crest Biopsies from Patients with Osteoporosis: A Paired Study before and after Treatment

scientific article published on 01 March 2003

Effects of PTH and alendronate on type I collagen isomerization in postmenopausal women with osteoporosis: the PaTH study

scientific article published on September 2008

Effects of Parathyroid Hormone Administration on Bone Strength in Hypoparathyroidism

scientific article published on January 2016

Effects of parathyroid hormone rhPTH(1-84) on phosphate homeostasis and vitamin D metabolism in hypoparathyroidism: REPLACE phase 3 study

scientific article published on 12 October 2016

Efficacy and safety of recombinant human parathyroid hormone (1-84) in hypoparathyroidism (REPLACE): a double-blind, placebo-controlled, randomised, phase 3 study

scientific article published on 7 October 2013

Efficacy of bisphosphonates in reducing fracture risk in postmenopausal osteoporosis

scientific article

Eighteen Months of Treatment With Subcutaneous Abaloparatide Followed by 6 Months of Treatment With Alendronate in Postmenopausal Women With Osteoporosis: Results of the ACTIVExtend Trial

scientific article published on February 2017

Elevations in serum and urinary calcium with parathyroid hormone (1-84) with and without alendronate for osteoporosis

scientific article published on 12 December 2006

Epidemiology and Diagnosis of Hypoparathyroidism

scientific article

Evaluation of Bone Mineral Density and Bone Biomarkers in Patients With Type 2 Diabetes Treated With Canagliflozin

scientific article

Executive summary of the 2013 International Society for Clinical Densitometry Position Development Conference on Body Composition

scientific article published on October 2013

Executive summary of the 2013 International Society for Clinical Densitometry Position Development Conference on bone densitometry

scientific article published on October 2013

Femoral bone strength and its relation to cortical and trabecular changes after treatment with PTH, alendronate, and their combination as assessed by finite element analysis of quantitative CT scans

scientific article published on December 2008

For osteoporosis, are two antiresorptive drugs better than one?

scientific article published in March 2002

Glucocorticoid-induced osteoporosis: an update

scientific article

Glucocorticoid-induced osteoporosis: clinical and therapeutic aspects

scientific article

Glucocorticoid-induced osteoporosis: hope on the HORIZON.

scientific article

Guidelines for the management of asymptomatic primary hyperparathyroidism: summary statement from the Fourth International Workshop

scientific article

Guidelines for the management of asymptomatic primary hyperparathyroidism: summary statement from the third international workshop

scientific article published on February 2009

Height and lower extremity length as predictors of hip fracture: results of the NHANES I Epidemiologic Follow-up Study

scientific article published in September 2003

Hetereogeneity in skeletal response to full-length parathyroid hormone in the treatment of osteoporosis.

scientific article published on 28 February 2007

High-resolution peripheral quantitative computed tomography can assess microstructural and mechanical properties of human distal tibial bone

scientific article

How Long to Treat with Denosumab

scientific article published on 16 October 2015

Human chorionic gonadotropin measurements in parathyroid carcinoma

scientific article

Hypoglycemia Secondary to Sulfonylurea Ingestion in a Patient with End Stage Renal Disease: Results from a 72-Hour Fast

scientific article published on 17 November 2015

Hypoparathyroidism

scientific article published on 31 August 2017

Hypoparathyroidism in the adult: epidemiology, diagnosis, pathophysiology, target-organ involvement, treatment, and challenges for future research

scientific article

Hypoparathyroidism: clinical features, skeletal microstructure and parathyroid hormone replacement

scientific article published on March 2010

IODINE NUTRITION IN THE REPUBLIC OF ARTSAKH (NAGORNO KARABAKH).

scientific article published on 24 April 2018

Idiopathic osteoporosis in men.

scientific article

Idiopathic osteoporosis in premenopausal women

scientific article

In Memoriam: Sergio Ragi-Eis, MD, CCD, CDT (April 8, 1962–February 22, 2012).

scientific article published in July 2012

In Vivo Precision of Digital Topological Skeletonization Based Individual Trabecula Segmentation (ITS) Analysis of Trabecular Microstructure at the Distal Radius and Tibia by HR-pQCT.

scientific article published on April 2015

Incidence of vertebral fractures in calcium and vitamin D-supplemented postmenopausal Brazilian women with osteopenia or osteoporosis: data from Arzoxifene Generations Trial

scientific article

International Society for Clinical Densitometry 2007 Adult and Pediatric Official Positions

scientific article published on 15 August 2008

International Society for Clinical Densitometry official positions: Asia-Pacific Region consensus

scientific article published on 21 July 2010

Joint Official Positions of the International Society for Clinical Densitometry and International Osteoporosis Foundation on FRAX(®). Executive Summary of the 2010 Position Development Conference on Interpretation and use of FRAX® in clinical practi

scientific article published on July 2011

Lawrence G. Raisz November 13, 1925-August 25, 2010.

scientific article published in May 2011

List of Contributors

Lower Cortical Porosity and Higher Tissue Mineral Density in Chinese American Versus White Women

scientific article published on March 1, 2014

Management of Hypoparathyroidism: Present and Future

scientific article

Management of Hypoparathyroidism: Summary Statement and Guidelines

scientific article published on 4 March 2016

Mechanism of action study to evaluate the effect of rosiglitazone on bone in postmenopausal women with type 2 diabetes mellitus: rationale, study design and baseline characteristics

scientific article published on 16 December 2011

Mechanisms of anabolic therapies for osteoporosis

scientific article published on August 2007

Mini-review: new therapeutic options in hypoparathyroidism

scientific article published on 07 February 2012

Morphometric vertebral fractures in postmenopausal women with primary hyperparathyroidism

scientific article published on 28 April 2009

New Clues that May Link Osteoporosis to the Circulating Lipid Profile

scientific article published on 25 September 2013

New Directions in Treatment of Hypoparathyroidism

scientific article published on 01 December 2018

New anabolic therapies in osteoporosis

scientific article

New anabolic therapies in osteoporosis

scientific article published on 01 March 2003

New and developing pharmacotherapy for osteoporosis in men.

scientific article published on 19 January 2018

New insights into the effects of primary hyperparathyroidism on the cortical and trabecular compartments of bone

scientific article published on March 26, 2013

New observations on bone quality in mild primary hyperparathyroidism as determined by quantitative backscattered electron imaging

scientific article

Noninvasive Assessment of Skeletal Microstructure and Estimated Bone Strength in Hypoparathyroidism

scientific article published on August 2015

Nontruncated amino-terminal parathyroid hormone overproduction in two patients with parathyroid carcinoma: a possible link to HRPT2 gene inactivation

scientific article

Normocalcemic hyperparathyroidism and hypoparathyroidism in two community-based nonreferral populations

scientific article published on 20 May 2013

Normocalcemic primary hyperparathyroidism

scientific article

Novel Therapies for Postmenopausal Osteoporosis

scientific article published on 23 December 2016

OR03-1 The Effect of Abaloparatide on Bone Mineral Density and Fracture Incidence in Postmenopausal Women with Osteoporosis and Osteoarthritis.

scientific article published on 30 April 2019

OR30-1 Safety and Efficacy of Recombinant Human Parathyroid Hormone 1-84 for the Treatment of Adults with Chronic Hypoparathyroidism: Six-Year Results of the RACE Study.

scientific article published on 30 April 2019

Occurrence of hypercalciuria in patients with osteoporosis treated with teriparatide

scientific article published on 3 July 2007

Official Positions of the International Society for Clinical Densitometry and executive summary of the 2007 ISCD Position Development Conference

scientific article published on January 2008

Official positions of the International Society for Clinical Densitometry and Executive Summary of the 2005 Position Development Conference

scientific article

One year of alendronate after one year of parathyroid hormone (1-84) for osteoporosis

scientific article published in August 2005

Optimal dosing and delivery of parathyroid hormone and its analogues for osteoporosis and hypoparathyroidism - translating the pharmacology

scientific article

Osteonecrosis of the jaw--do bisphosphonates pose a risk?

scientific article

Osteoporosis diagnosis in men: the T-score controversy revisited

scientific article

Osteoporosis in Crisis: It's Time to Focus on Fracture

scientific article published on 29 May 2017

Osteoporosis in men: an Endocrine Society clinical practice guideline

scientific article published on June 2012

Osteoporosis in men: pathophysiology and treatment

scientific article published on April 2007

Osteoporosis in men: pathophysiology and treatment

scientific article published in March 2007

Osteoporosis update from the 2010 santa fe bone symposium

scientific article published on January 2011

Osteoporosis update from the 2012 Santa Fe Bone Symposium

scientific article published on 15 February 2013

Osteoporosis: what's new and on the horizon

scientific article published on December 2013

PTH(1-84) Administration in Hypoparathyroidism Transiently Reduces Bone Matrix Mineralization

scientific article published on 25 June 2015

PTH(1-84) administration reverses abnormal bone-remodeling dynamics and structure in hypoparathyroidism

scientific article

PTH(1-84) is associated with improved quality of life in hypoparathyroidism through 5 years of therapy

scientific article

PTH(1-84) replacement therapy for the treatment of hypoparathyroidism

scientific article

PTH-dependent adenylyl cyclase activation in SaOS-2 cells: passage dependent effects on G protein interactions

scientific article

Parathyroid Hormone Directs Bone Marrow Mesenchymal Cell Fate

scientific article published on 25 January 2017

Parathyroid carcinoma

article from 2008

Parathyroid hormone 1-84 alters circulating vascular endothelial growth factor levels in hypoparathyroidism

scientific article

Parathyroid hormone and the cardiovascular system

scientific article published on June 2008

Parathyroid hormone as an anabolic skeletal therapy

scientific article published in January 2005

Parathyroid hormone in the evaluation of hypercalcemia

scientific article

Parathyroid hormone therapy for hypoparathyroidism

scientific article

Parathyroid hormone treatment improves the cortical bone microstructure by improving the distribution of type I collagen in postmenopausal women with osteoporosis

scientific article published on March 1, 2012

Parathyroid hormone-related protein is produced in the myocardium and increased in patients with congestive heart failure

scientific article published in October 2002

Parathyroid hormone: anabolic and catabolic actions on the skeleton

scientific article

Perspectives on glucocorticoid-induced osteoporosis

scientific article published on April 2004

Pins and plaster aren't enough: a call for the evaluation and treatment of patients with osteoporotic fractures.

scientific article

Position statements of the International Society for Clinical Densitometry: methodology

scientific article

Pre-operative localization of abnormal parathyroid tissue by 99mTc-sestamibi in primary hyperparathyroidism using four-quadrant site analysis: an evaluation of the predictive value of vitamin D deficiency

scientific article

Premenopausal and postmenopausal differences in bone microstructure and mechanical competence in Chinese-American and white women

scientific article published on June 1, 2013

Presentation of Hypoparathyroidism: Etiologies and Clinical Features

scientific article

Prevalence of kidney stones and vertebral fractures in primary hyperparathyroidism using imaging technology

scientific article

Primary Hyperparathyroidism

scientific article (publication date: 2016)

Primary Hyperparathyroidism: A Tale of Two Cities Revisited - New York and Shanghai

scientific article published on 28 June 2013

Primary Hyperparathyroidism: Epidemiology and Clinical Consequences

scientific article (publication date: 2002)

Primary hyperparathyroidism after laser therapy to the larynx

scientific article

Primary hyperparathyroidism is associated with abnormal cortical and trabecular microstructure and reduced bone stiffness in postmenopausal women

scientific article published on May 1, 2013

Primary hyperparathyroidism: recent advances

scientific article published on 13 April 2018

Proceedings of the 2011 Santa Fe Bone symposium

scientific article published in January 2012

Proceedings of the 2016 Santa Fe Bone Symposium: New Concepts in the Management of Osteoporosis and Metabolic Bone Diseases

scientific article published on 6 February 2017

Proceedings of the 2017 Santa Fe Bone Symposium: Insights and Emerging Concepts in the Management of Osteoporosis.

scientific article published on 20 November 2017

Proceedings of the Eighth Annual Santa Fe Bone Symposium, August 3-4, 2007.

scientific article published on 14 February 2008

Race and diet interactions in the acquisition, maintenance, and loss of bone

scientific article published on June 2008

Racial Differences in the Effect of Early Milk Consumption on Peak and Postmenopausal Bone Mineral Density

scientific article published on November 1, 2003

Recovery of parathyroid hormone secretion and function in postoperative hypoparathyroidism: a case series

scientific article published on 13 September 2013

Reduced bone mineral density is associated with breast arterial calcification

scientific article

Relationship of bone mineralization density distribution (BMDD) in cortical and cancellous bone within the iliac crest of healthy premenopausal women.

scientific article published on 19 August 2014

Report of the International Society for Clinical Densitometry 2007 Adult Position Development Conference and Official Positions

scientific article published in July 2008

Response to "The Perspective of the International Osteoporosis Foundation on the Official Positions of the International Society for Clinical Densitometry," by John A. Kanis et al.

scientific article published in January 2005

Romosozumab for the treatment of osteoporosis

scientific article

Safety and Efficacy of Recombinant Human Parathyroid Hormone in Adults With Hypoparathyroidism Randomly Assigned to Receive Fixed 25-μg or 50-μg Daily Doses

scientific article

Sclerostin measurement in human disease: Validity and current limitations

scientific article published on 11 October 2016

Sclerostin: Therapeutic Horizons Based Upon Its Actions

scientific article published on March 1, 2012

Serum vitamin A concentration and the risk of hip fracture among women 50 to 74 years old in the United States: a prospective analysis of the NHANES I follow-up study

scientific article

Short-term changes in bone turnover markers and bone mineral density response to parathyroid hormone in postmenopausal women with osteoporosis

scientific article

Signs and Symptoms of Hypoparathyroidism

scientific article published on 01 December 2018

Skeletal Microstructure and Estimated Bone Strength Improve Following Parathyroidectomy in Primary Hyperparathyroidism

scientific article published on 20 October 2017

Skeletal and extra-skeletal actions of vitamin D: Current evidence and outstanding questions

scholarly article by Roger Bouillon et al published 12 October 2018 in Endocrine Reviews

Skeletal changes after restoration of the euparathyroid state in patients with hypoparathyroidism and primary hyperparathyroidism

scientific article

Standards for performing DXA in individuals with secondary causes of osteoporosis

scientific article

Stress Fractures: Concepts and Therapeutics

scientific article

Summary of the International Society For Clinical Densitometry 2005 Position Development Conference

scientific article published in May 2007

Summary statement from a workshop on asymptomatic primary hyperparathyroidism: a perspective for the 21st century.

scientific article

Supplement on Primary Hyperparathyroidism

scientific article published on January 5, 2013

Surgery or surveillance for mild asymptomatic primary hyperparathyroidism: a prospective, randomized clinical trial

scientific article

The Effect of PTH(1–84) on Quality of Life in Hypoparathyroidism

scientific article published on April 17, 2013

The Effects of Long-term Administration of rhPTH(1-84) in Hypoparathyroidism by Bone Histomorphometry.

scientific article

The anabolic effects of parathyroid hormone therapy

scientific article

The calcimimetic cinacalcet normalizes serum calcium in subjects with primary hyperparathyroidism

scientific article

The cell biology of parathyroid hormone in osteoblasts

scientific article published on June 2008

The diagnosis and management of asymptomatic primary hyperparathyroidism

scientific article published on September 2006

The effects of parathyroid hormone and alendronate alone or in combination in postmenopausal osteoporosis

scientific article published on 20 September 2003

The effects of tibolone in older postmenopausal women

scientific article published on August 2008

The natural history of primary hyperparathyroidism with or without parathyroid surgery after 15 years

scientific article published on 10 June 2008

The official positions of the International Society for Clinical Densitometry: perceptions and commentary

scientific article published on 09 July 2009

The potential of parathyroid hormone as a therapy for osteoporosis.

scientific article

The potential use of antisclerostin therapy in chronic kidney disease-mineral and bone disorder

scientific article published on July 2015

The role of estrogens in men and androgens in women.

scientific article

The use of parathyroid hormone in the treatment of osteoporosis

scientific article published on June 2006

Therapy of Hypoparathyroidism With PTH(1-84): A Prospective Six Year Investigation of Efficacy and Safety

scientific article published on 04 May 2016

Therapy of Hypoparathyroidism with PTH(1–84): A Prospective Four-Year Investigation of Efficacy and Safety

scientific article published on November 15, 2012

Therapy of Osteoporosis in Men with Teriparatide

scientific article published on October 25, 2011

Three dimensional cancellous bone structure in hypoparathyroidism

scientific article

Trabecular Bone Score in Obese and Non-obese Subjects with Primary Hyperparathyroidism Before and After Parathyroidectomy.

scientific article published on 24 January 2018

Trabecular bone score is associated with volumetric bone density and microarchitecture as assessed by central QCT and HRpQCT in Chinese American and white women

scientific article published on 27 September 2013

Trabecular bone score: a noninvasive analytical method based upon the DXA image

scientific article

Trabecular bone score: perspectives of an imaging technology coming of age.

scientific article

Treatment of glucocorticoid-induced osteoporosis

scientific article published on February 1, 2009

Tribute to Larry Raisz, MD, the Founding Editor of JBMR.

scientific article

Tumor-induced osteomalacia: an important cause of adult-onset hypophosphatemic osteomalacia in China: Report of 39 cases and review of the literature

scientific article

Update on hypoparathyroidism

scientific article published on 01 July 2019

Update on osteoporosis therapy

scientific article published on August 2006

Utility of the trabecular bone score (TBS) in secondary osteoporosis

scientific article published on 23 May 2014

Vitamin D and primary hyperparathyroidism: more insights into a complex relationship

scientific article published on 17 November 2016

Vitamin D assays and the definition of hypovitaminosis D: results from the First International Conference on Controversies in Vitamin D

scholarly article by Christopher T Sempos et al published October 2018 in British Journal of Clinical Pharmacology

Vitamin D deficiency influences histomorphometric features of bone in primary hyperparathyroidism

scientific article published on October 13, 2010

Vitamin D toxicity due to a commonly available "over the counter" remedy from the Dominican Republic

scientific article published in December 2010

When should a gynecologist refer a patient for specialty care in osteoporosis?

scientific article