E. Simpson

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Farmer, R. D., Williams, T. J., Simpson, E. L., & Nightingale, A. L. (2000). Effect of 1995 pill scare on rates of venous thromboembolism among women taking combined oral contraceptives: analysis of general practice research database. Bmj.
Nightingale, A. L., Lawrenson, R. A., Simpson, E. L., Williams, T. J., MacRae, K. D., & Farmer, R. D. (2000). The effects of age, body mass index, smoking and general health on the risk of venous thromboembolism in users of combined oral contraceptives. Eur J Contracept Reprod Health Care.