article published in 1970

scientific article published in January 1971

scientific article published on September 1, 1980

scientific article published on 25 October 2017

scientific article published on 11 December 2017

article by Claudio Ceconi et al published February 2011 in International Journal of Cardiology

scientific article published in January 1982

scientific article

scientific article published in January 1971

scientific article published in January 1973

scientific article published in January 1973

scientific article published in January 1970

scientific article

scientific article published in January 1975

scientific article published in January 1976

scientific article (publication date: 1969)

scientific article

scientific article (publication date: 16 April 2014)

scientific article published in January 1970

scientific article published in January 1971

scientific article published in January 1973

scientific article published in January 1973

scientific article published in January 1978