[1] Univ Texas MD Anderson Canc Ctr, Dept Gynecol Oncol, Unit 1362, Houston, TX 77030 USA
[2] Johns Hopkins Univ Hosp, Dept Obstet & Gynecol, Baltimore, MD USA
[3] Univ Texas Med Branch Galveston, Dept Obstet & Gynecol, Galveston, TX USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Biostat, Houston, TX 77030 USA
[5] Washington Univ, Sch Med, Dept Obstet & Gynecol Oncol, St Louis, MO USA
[6] Duke Univ, Med Ctr, Dept Psychiat, Durham, NC 27710 USA