[1] Univ Texas SW Med Ctr Dallas, Dept Obstet & Gynecol, Dallas, TX 75390 USA
[2] Univ Texas SW Med Ctr Dallas, Dept Cell Biol, Dallas, TX 75390 USA
[3] Johns Hopkins Univ, Dept Biomed Engn, Baltimore, MD 21205 USA
[4] Univ Texas SW Med Ctr Dallas, Green Ctr Reprod Biol Sci, Dallas, TX 75390 USA
[5] Corning Inc, Div Sci & Technol, Corning, NY 14831 USA