Contraception
Volume 71, Issue 3 , Pages 162-169, March 2005

Twenty micrograms vs. >20 μg estrogen oral contraceptives for contraception: systematic review of randomized controlled trials

Family Health International, Research Triangle Park, NC 27709, USA

Received 28 August 2004; accepted 13 September 2004.

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PII: S0010-7824(04)00272-0

doi:10.1016/j.contraception.2004.09.005

Contraception
Volume 71, Issue 3 , Pages 162-169, March 2005

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