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Hannaford PC.The progestogen content of combined oral contraceptives and venous thromboembolic risk. BMJ 343: [2 pages], 25 Oct 2011. Available from: URL: http://dx.doi.org/10.1136/bmj.d6592
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Progestogen content of oral contraceptives singled out in VTE. React. Wkly. 1376, 3 (2011). https://doi.org/10.2165/00128415-201113760-00006
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DOI: https://doi.org/10.2165/00128415-201113760-00006