Steinauer Jody, Dehlendorf Christine, Grumbach Kevin, Landy Uta, Darney Philip
Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA.
Contraception. 2012 Sep;86(3):188-90. doi: 10.1016/j.contraception.2011.12.001. Epub 2012 Apr 23.