DOI:
10.1055/s-00000142
Frauenheilkunde up2date
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References
[Anonym]
A multinational case-control study of cardiovascular disease and steroid hormone contraceptives. Description and validation of methods. World Health Organization Collaborative Study of Cardiovascular and Steroid Hormone Contraception.
J Clin Epidemiol 1995;
48: 1513-1547
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