DOI:
10.1055/s-00035024
Thrombosis and Haemostasis
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References
Vinogradova Y, Coupland C, Hippisley-Cox J.
Use of combined oral contraceptives and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases.
BMJ 2015;
350: h2135
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