[1] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Hyderabad, Telangana, India
[2] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Div Colorectal Oncol, Hyderabad, Telangana, India
[3] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Div Upper GI Oncol, Hyderabad, Telangana, India
[4] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Div Gynecol Oncol, Hyderabad, Telangana, India
[5] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Div Thorac Oncol, Hyderabad, Telangana, India
[6] Basavatarakam Indo Amer Canc Hosp & Res Inst, Dept Surg Oncol, Div Urol Oncol, Hyderabad, Telangana, India
[7] Univ Nebraska Med Ctr, Coll Publ Hlth, Dept Biostat, Omaha, NE USA
[8] Univ Nebraska Med Ctr, Dept Surg, Omaha, NE USA