[1] Case Western Reserve Univ, Univ Hosp Case Med Ctr, Dept Gynecol, Cleveland, OH 44106 USA
[2] Cleveland Clin, Dept OB GYN, Cleveland, OH 44106 USA
[3] Cleveland Clin, Womens Hlth Inst, Cleveland, OH 44106 USA
[4] Mt Sinai Hosp, Dept Obstet & Gynaecol, Chicago, IL USA
[5] Greater Baltimore Med Ctr, Baltimore, MD USA
[6] Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA
[7] Univ British Columbia, Fac Med, Dept Obstet & Gynaecol, Div Reprod Endocrinol & Infertil, Vancouver, BC V6H 3V4, Canada