Preterm birth in Sweden 1973-2001: Rate, subgroups, and effect of changing patterns in multiple births, maternal age, and smoking
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| Description | scholarly article by Nils-Halvdan Morken et al published June 2005 in Acta Obstetricia et Gynecologica Scandinavica |
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author: Henrik Hagberg Nils-Halvdan Morken Bo Jacobsson Karin Källén |
| Publication date | June 2005 |
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