<style face="normal" font="default" size="100%">The effects of age, body mass index, smoking and general health on the risk of venous thromboembolism in users of combined oral contraceptives</style>

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31<style face="normal" font="default" size="100%">The effects of age, body mass index, smoking and general health on the risk of venous thromboembolism in users of combined oral contraceptives</style><style face="normal" font="default" size="100%">The effects of age, body mass index, smoking and general health on the risk of venous thromboembolism in users of combined oral contraceptives</style>