[1] AIIMS, Dept Oncoanaesthesia, Dr BR Ambedkar Inst Rotary Canc Hosp, New Delhi, India
[2] AIIMS, Dept Palliat Med, Dr BR Ambedkar Inst Rotary Canc Hosp, New Delhi, India
[3] VA Palo Alto Healthcare Syst, Palo Alto, CA USA
[4] Stanford Univ, Sch Med, Dept Med, Palo Alto, CA 94304 USA
[5] Stanford Healthcare, Palo Alto, CA USA
[6] AIIMS, Dr BR Ambedkar Inst Rotary Canc Hosp, Surg Oncol, New Delhi, India