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Efficacy of ethinylestradiol 20 µg/drospirenone 3 mg in a flexible extended regimen in women with moderate-to-severe primary dysmenorrhoea: an open-label, multicentre, randomised, controlled study

By Thomas Strowitzki, Bodo Kirsch and Jörg Elliesen
Topics: Articles
Publisher: BMJ Group
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Provided by: PubMed Central
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