1. Department of Anaesthesiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
2. Department of Neurosurgery and Neurocritical Care, Lok Nayak Hospital, Assoc. Maulana Azad Medical College, New Delhi, India
3. Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India