[1] Ctr Human Reprod, New York, NY 10021 USA
[2] Rockefeller Univ, Stem Cell Biol & Mol Embryol Lab, 1230 York Ave, New York, NY 10021 USA
[3] Vienna Univ Med, Dept Obstet & Gynecol, Vienna, Austria
[4] Wake Forest Univ, Dept Obstet & Gynecol, Winston Salem, NC 27109 USA