1. Department of Radiology, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India,
2. Department of Critical Care and Anaesthesia, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India,
3. Department of Anaesthesia and Intensive Care, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India,