Munro M G, Critchley Hod, Fraser I S
Department of Obstetrics & Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
Kaiser Permanente, Medical Center, Los Angeles, CA, USA.
BJOG. 2017 Jan;124(2):185-189. doi: 10.1111/1471-0528.14431.