Errol R Norwitz1, James A Greenberg2. 1. Louis E. Phaneuf Professor of Obstetrics & Gynecology, Tufts University School of Medicine, Chairman, Department of Obstetrics & Gynecology, Tufts Medical Center, Boston, MA. 2. Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Division of Gynecology, Faulkner Hospital, and Department of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, MA.
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