Muhammad Akbar Baig1, Asad Mian2, Erfaan Hussain3, Shahan Waheed1. 1. Department of Emergency Medicine, Aga Khan University Hospital, Karachi, Sindh 74800, Pakistan. 2. Departments of Emergency Medicine, Aga Khan University Hospital, Pediatrics & Child Health Stadium Road, Karachi, Sindh 74800, Pakistan. 3. Adult Critical Care Services, Aga Khan University Hospital, Karachi, Sindh 74800, Pakistan.