1. Department of Obstetrics & Gynecology, Division of Pelvic Medicine and Reconstructive Surgery, University of Virginia, Charlottesville, Virginia
2. Department of Statistical Science, Duke University, Durham, North Carolina
3. Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon
4. Department of Obstetrics & Gynecology Oregon Health & Science University, Portland, Oregon
5. Department of Obstetrics and Gynecology, Division of Urogynecology & Reconstructive Pelvic Surgery, Duke University Medical Center, Durham, North Carolina
6. Department of Medicine, Division of Geriatrics, Duke University Medical Center, Durham, North Carolina
7. GRECC, Durham VA Medical Center, Durham, North Carolina
8. Division of Reproductive Sciences, Duke University Medical Center, Durham, North Carolina