作者单位:Univ Virginia, Dept Obstet & Gynecol, Charlottesville, VA USA[1]Santa Clara Valley Med Ctr, San Jose, CA 95128 USA[2]Kaiser Permanente, Div Res, Oakland, CA USA[3]Kaiser Permanente, Northern Calif Gynecol Canc Program, 2238 Geary Blvd, San Francisco, CA 94115 USA[4]