Affiliation: | a Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Tufts-New England Medical Center, Boston, Massachusetts, and Women and Infants Hospital, Providence, Rhode Island b Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan c Department of Obstetrics and Gynecology, Mary Hitchcock Hospital, Dartmouth Medical School, Hanover, New Hampshire d Department of Anatomy and Cellular Biology, Tufts University School of Medicine, Boston, Massachusetts |