Moreau Caroline, Trussell James, Glasier Anna
Gender, Sexual and Reproductive Health, CESP for Research in Epidemiology and Population Health, 94276 Le Kremlin Bicetre, France.
Contraception. 2012 Jan;85(1):9-10. doi: 10.1016/j.contraception.2011.04.019. Epub 2011 Jun 16.