Professor of Obstetrics and Gynecology
Vice Chair for Research and Academic Development
Director of the Divisions of Maternal-Fetal Medicine and Research
University of Mississippi Medical Center
Jackson
MI
Dr James N. Martin Jr would like to gratefully acknowledge Dr Marium G. Holland and Dr Alex C. Vidaeff, the previous contributors to this topic. MGH declares that she has no competing interests. ACV is an author of a number of references cited in this topic.
Professor and Director
Division of Maternal-Fetal Medicine
Department of Obstetrics and Gynecology
University of Iowa Hospitals and Clinics
Iowa City
IA
Professor of Obstetrics
Trinity College
University of Dublin
Consultant Obstetrician
Coombe Women and Infants University Hospital
Dublin
Ireland
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