Combined oral contraceptives and the risk of venous thromboembolism carriers of antithrombin, protein C or S deficiency: Sub-analysis of a prospective cohort study. Bleeding Thromb Vascul Biol [Internet]. 2022 Nov. 3 [cited 2025 Apr. 26];1(3). Available from: https://www.btvb.org/btvb/article/view/42