1. Division of Gynecology, Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, Minnesota.
2. Department of Surgery, Mayo Clinic, Rochester, Minnesota.
3. Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas.
4. Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
5. Division of Preventive Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
6. Hadassah-Hebrew University Braun School of Public Health, Jerusalem, Israel.
7. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, Minnesota.
8. Division of Epidemiology & Community Health, University of Minnesota, Minneapolis, Minnesota.