[1] Emory Univ, Dept Urol, Winship Canc Inst, Sch Med, Atlanta, GA 30322 USA
[2] Emory Univ, Dept Radiat Oncol, Winship Canc Inst, Sch Med, Atlanta, GA 30322 USA
[3] Emory Univ, Dept Epidemiol, Rollins Sch Publ Hlth, Atlanta, GA 30322 USA
[4] Emory Univ, Dept Med, Winship Canc Inst, Sch Med, Atlanta, GA 30322 USA
[5] Beth Israel Deaconess Med Ctr, Div Hematol Oncol, Boston, MA 02215 USA
[6] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Mongan Inst Hlth Policy, Boston, MA USA