1. Hormonal contraception and risk of venous thromboembolism: national follow-up study;Lidegaard;BMJ,2009
2. Hormonal contraception and venous thromboembolism;Lidegaard;Acta Obstet Gynecol Scand,2012
3. The venous thrombotic risk of oral contraceptives, effects of oestrogen dose and progestogen type: results of the MEGA case-control study;van Hylckama Vlieg;BMJ,2009
4. Different combined oral contraceptives and the risk of venous thrombosis: systematic review and network meta-analysis;Stegeman;BMJ,2013
5. Risk of venous thromboembolism from use of oral contraceptives containing different progestogens and oestrogen doses: Danish cohort study, 2001-9;Lidegaard;BMJ,2011