1. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology and Department of Surgery, Mayo Clinic and Mayo Medical School, Rochester, Minnesota.
2. Obstetrics and Gynecology and Diabetes and Obesity Core, Center for Women's Health Research, University of North Carolina School of Medicine, Chapel Hill, North Carolina.
3. Department of Obstetrics and Gynecology, Cleveland Clinic, Cleveland, Ohio.
4. Division of Health Care Policy and Research, Mayo Clinic and Mayo Medical School, Rochester, Minnesota.