Tommaso Falcone, MD, Cleveland Clinic, Department of Obstetrics and Gynecology, Lerner College of Medicine, Cleveland, Ohio, USAWilliam W. Hurd, MD, MSc, MPH, Department of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USADepartment of Obstetrics and Gynecology, University of Alabama, Birmingham, AL, USA; Professor Emeritus, Duke University School of Medicine, Durham, NC, USA