1. Department of Reproductive Medicine (M.M., S.S.H., T.B., S.S., G.F.E.), University of California, San Diego, La Jolla, California 92093
2. Department of Obstetrics and Gynecology (B.S.), University Clinic of Münster, Münster D-48129, Germany
3. Department of Obstetrics and Gynecology (A.H.), Sheba Medical Center, Tel Hashomer 52621, Israel
4. Division of Reproductive Sciences (E.Y.A.), Department of Obstetrics and Gynecology, University of Utah Health Sciences Center, Salt Lake City, Utah 84112