1. Department of Anaesthesiology, Institute of Post Graduate Medical Education and Research, Kolkata, West Bengal, India,
2. Department of Anaesthesiology, Pain Medicine and Critical Care, R.G. Kar Medical College, Kolkata, West Bengal, India,
3. Department of Anaesthesiology, Institute of Post Graduate Medical Education & Research, Kolkata, West Bengal, India;
4. Critical Care Specialist and Staff Physician, Intensive Care Unit, Hospital Morales, Meseguer, Murcia, Spain