1. Department of Anaesthesiology, Kalyan Singh Super Specialty Cancer Institute, Lucknow, Uttar Pradesh, India
2. Department of Public Health, Kalyan Singh Super Speciality Cancer Institute, Lucknow, Uttar Pradesh, India
3. Department of Anaesthesiology and Critical Care, All India Institute of Medical Sciences Bathinda, Punjab, India
4. Department of Anaesthesiology and Critical Care, Hind Institute of Medical Science, Sitapur, Uttar Pradesh, India