1 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Madison, Wisconsin.
3 Department of Obstetrics and Gynecology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio; Department of Obstetrics and Gynecology, University of Central Florida, Orlando, Florida; Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China.