Combined oral contraceptives: venous thrombosis

Frits R. Rosendaal(Leiden University Medical Center), Frans M. Helmerhorst(Leiden University Medical Center), Astrid van Hylckama Vlieg(Leiden University Medical Center), Theo Stijnen(Leiden University Medical Center), Bernardine H. Stegeman(University College London)
Cochrane Database of Systematic Reviews
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