Lifetime cancer risk and combined oral contraceptives: the Royal College of General Practitioners’ Oral Contraception Study

Breast cancer and hormone replacement therapy: collaborative reanalysis of data from 51 epidemiological studies of 52 705 women with breast cancer and 108 411 women without breast cancer

The Lancet · 1997 · 2.5K citations · Full text

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Cancer risk among users of oral contraceptives: cohort data from the Royal College of General Practitioner's oral contraception study

Philip C Hannaford, Sivasubramaniam Selvaraj, Alison M. Elliott et al. · BMJ · 2007 · 329 citations · Full text

Classification of Occupations 1960.

Population Studies · 1961 · 326 citations

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Venous thrombosis in users of non-oral hormonal contraception: follow-up study, Denmark 2001-10

Lars Nielsen, Charlotte Wessel Skovlund · BMJ · 2012 · 317 citations · Full text