DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Hunter DJ, Manson JE, Colditz GA, Chason-Taber L, Troy L, Stampfer MJ, Speizer FE, Willet WC.
Reproducibility of oral contraceptive histories and validity of hormone composition reported in a cohort of US women.
Contraception 1997; 56: 373-378
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