1. Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Department of Obstetrics & Gynecology, The University of Texas Medical Branch, Galveston, TX, USA
3. Department of Obstetrics & Gynecology, Georgia Regents University, Augusta, GA, USA
4. Department of Obstetrics & Gynecology, Mercer University, Macon, GA, USA