Response to Letter to the Editor
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PII: S0010-7824(10)00009-0
doi:10.1016/j.contraception.2010.01.008
© 2010 Elsevier Inc. All rights reserved.
PII: S0010-7824(10)00009-0
doi:10.1016/j.contraception.2010.01.008
© 2010 Elsevier Inc. All rights reserved.