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The Cochrane Database of Systematic Reviews|November 11, 2011
Quadriphasic versus monophasic oral contraceptives for contraceptionHuib A A M Van Vliet, Marjolein Raps, Laureen M Lopez, et al.
Thrombosis and Haemostasis|February 15, 2013
The effect of different hormonal contraceptives on plasma levels of free protein S and free TFPIMarjolein Raps, Frans M Helmerhorst, Kathrin Fleischer, et al.
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