Delaney Shani, Gardella Carolyn, Saracino Misty, Magaret Amalia, Wald Anna
Department of Obstetrics and Gynecology, University of Washington, Seattle.
Department of Laboratory Medicine, University of Washington, Seattle.
JAMA. 2014 Aug 20;312(7):746-8. doi: 10.1001/jama.2014.4359.