The venous thrombotic risk of oral contraceptives, effects of oestrogen dose and progestogen type: results of the MEGA case-control study

@inproceedings{Vlieg2009TheVT,
  title={The venous thrombotic risk of oral contraceptives, effects of oestrogen dose and progestogen type: results of the MEGA case-control study},
  author={Astrid van Hylckama Vlieg and Frans M. Helmerhorst and Jan P. Vandenbroucke and Carine J. M. Doggen and F. R. Rosendaal},
  booktitle={BMJ},
  year={2009}
}
OBJECTIVE To assess the thrombotic risk associated with oral contraceptive use with a focus on dose of oestrogen and type of progestogen of oral contraceptives available in the Netherlands. DESIGN Population based case-control study. SETTING Six participating anticoagulation clinics in the Netherlands (Amersfoort, Amsterdam, The Hague, Leiden, Rotterdam, and Utrecht). PARTICIPANTS Premenopausal women <50 years old who were not pregnant, not within four weeks postpartum, and not using a… CONTINUE READING
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