DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Vessey MP, Villard Mackintosh L, McPherson K, Yeates D.
Mortality among oral contraceptive users: 20 year follow up of women in a cohort study.
BMJ 1989; 299: 1487-1491
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