[1] Manipal Acad Higher Educ, Dept Palliat Med & Support Care, Manipal Comprehens Canc Care Ctr, Kasturba Med Coll, Manipal, India
[2] Cytecare Hosp, Dept Pain & Palliat Care, Bengaluru, Karnataka, India
[3] Homi Bhabha Natl Inst, Dept Anaesthesiol Crit Care & Pain, Tata Mem Ctr, E Borges Rd, Mumbai 400012, Maharashtra, India
[4] All India Inst Med Sci, Dept Oncoanaesthesia & Palliat Med, Dr BRA Inst Rotary Canc Hosp, New Delhi, India
[5] CK Birla Hosp Women, Dept Anaesthesia Crit Care & Pain Management, Gurugram, Haryana, India
[6] RG Kar Med Coll, Dept Anaesthesiol Crit Care & Pain, Kolkata, W Bengal, India