[1] New York Presbyterian Hosp, Dept Med, Div Endocrinol, New York, NY 10021 USA
[2] New York Presbyterian Hosp, Dept Obstet & Gynecol, Div Reprod Endocrinol, New York, NY 10021 USA
[3] Cornell Univ, Weill Med Coll, New York, NY 10021 USA
[4] Stanford Univ, Med Ctr, Dept Gynecol & Obstet, Div Reprod Endocrinol & Infertil, Stanford, CA 94305 USA