1. Department of Anaesthesiology, Ibra Hospital, Ministry of Health-Oman, Ibra-414, Sultanate of Oman, Oman
2. Department of Cardiac Anesthesia, National Heart Center, Royal Hospital, Muscat, Oman
3. Department of Pediatric Surgery, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
4. Department of Anaesthetics and Pain Management, Walsall Manor Hospital, Moat Rd, Walsall WS2 9PS, United Kingdom
5. Department of Anaesthesiology, Kings College Hospital, NHS Foundation Trust, London, United Kingdom