[1] Columbia Univ, Dept Obstet & Gynecol, New York Presbyterian Hosp, New York, NY USA
[2] Columbia Univ, New York Presbyterian Hosp, Herbert Irving Comprehens Canc Ctr, New York, NY USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Gynecol Oncol & Reprod Med, Houston, TX 77030 USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Hlth Serv Res, Houston, TX 77030 USA