[1] Southeastern Permanente Med Grp, Atlanta, GA USA
[2] Northwestern Univ, Feinberg Sch Med, Chicago, IL USA
[3] Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL USA
[4] Northwestern Hosp Obstet & Gynecol, Div Gynecol Oncol, Chicago, IL USA
[5] Northwestern Mem Hosp, Chicago, IL USA
[6] Inst Publ Hlth Med, Surg Outcomes & Qual Improvement Ctr, Chicago, IL USA
[7] Northwestern Univ, Feinberg Sch Med, 250 East Super St,5-2175, Chicago, IL 60611 USA