1. Department of Obstetrics & Gynecology, Washington University School of Medicine, St Louis, Missouri
2. Department of Obstetrics & Gynecology and Women's Health, University of Louisville School of Medicine, Louisville, Kentucky
3. Department of Surgery, Washington University School of Medicine, St Louis, Missouri
4. Department of Obstetrics & Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, Washington University School of Medicine, St Louis, Missouri
5. Department of Medicine, Section of Infectious Diseases and Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas