作者: David A. Miller

Edited by Errol R. Norwitz, MD, Ph D, MBA, is the Louis E. Phaneuf Professor of Obstetrics & Gynecology at Tufts University School of Medicine in Boston, MA, USA. Dr. Norwitz trained at Cape Town, Oxford and Harvard Schools of Medicine and is closely involved in the evidence based medicine movement. He is also the Chief Scientific Officer and Chair of Department of Obstetrics & Gynecology at the Tufts Medical Center. Carolyn M. Zelop, MD, is the Director of Ultrasound and Perinatal Research in the Division of MFM and Department of Obstetrics and Gynecology at The Valley Hospital, Ridgewood, NJ, and a Clinical Professor of Obstetrics and Gynecology at the NYU School of Medicine, New York, NY, USA. David A. Miller, MD, is a Professor of Obstetrics and Gynecology at the Division of Maternal-Fetal Medicine at Keck School of Medicine, University of Southern California, Los Angeles, CA, USA. David L. Keefe, MD, is the Stanley H. Kaplan Professor of Obstetrics and Gynecology, at the NYU Langone Medical Center, New York, NY, USA.