Oral contraceptive switching patterns in the United Kingdom: an important potential confounding variable in studies

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R D Farmer1, R A Lawrenson, I R Hambleton

  • 1Department of Public Health and Primary Care, Charing Cross and Westminster Medical School (University of London), Chelsea & Westminster Hospital, UK.

The European Journal of Contraception & Reproductive Health Care : the Official Journal of the European Society of Contraception
|March 1, 1996
PubMed
Abstract

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