1. Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, 12361 E. 17th Avenue, B198-5, Aurora, CO 80045, U.S.A.
2. Division of Maternal-Fetal Medicine/Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, 12361 E. 17th Avenue, B198-5, Aurora, CO 80045, U.S.A.