Hellerstein S, Feldman S, Duan T
Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA; Fish Women's Health Center, Brigham and Women's Hospital, Chestnut Hill, MA, USA.
BJOG. 2015 Jan;122(2):160-4. doi: 10.1111/1471-0528.12971. Epub 2014 Aug 20.