[1] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Radiat Oncol, Mumbai, Maharashtra, India
[2] Homi Bhabha Natl Inst, Tata Mem Ctr, Clin Res Secretariat, Mumbai, Maharashtra, India
[3] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Head & Neck Surg, Mumbai, Maharashtra, India
[4] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Med Oncol, Mumbai, Maharashtra, India
[5] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Radiat Oncol, Head & Neck Dis Management Grp, Mumbai 400012, Maharashtra, India