1. Division of Reproductive Endocrinology and Infertility (J.A.V., A.S., A.B.C, I.O., A.J.D.), Department of Obstetrics and Gynecology, University of California, Davis, Sacramento, California 95817
2. Division of Infertility and Reproductive Endocrinology (A.S.), 60-637 Poznan, Poland
3. Department of Gynecology, Obstetrics, and Gynecological Oncology (A.S), Karol Marcinkowski University of Medical Sciences, 60-637 Poznan, Poland
4. Department of Obstetrics and Gynecology (A.S.), University of Pennsylvania, Philadelphia, Pennsylvania 19104
5. IVI-Madrid (I.O.), 28023 Madrid, Spain
6. Women's Reproductive Health Research Center (K.L.B.-T, K.G.O.), Department of Obstetrics and Gynecology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232