[1] Rutgers New Jersey Med Sch, Obstet Gynecol & Womens Hlth, 185 South Orange Ave,E Level, Newark, NJ 07103 USA
[2] Univ Reprod Associates, Reprod Endocrinol & Infertil, 214 Terrace Ave, Hasbrouck Hts, NJ 07604 USA
[3] Rutgers State Univ, Biostat & Epidemiol Serv Ctr, 65 Bergen St, Newark, NJ 07103 USA
[4] Univ Washington, Dept Obstet & Gynecol, Box 356460, Seattle, WA 98195 USA
[5] Amer Coll Obstetricians & Gynecologists, 409 12th St, Washington, DC 20024 USA