1. Department of Pediatric Cardiology, National Heart Center, Royal Hospital, Muscat, Oman
2. Department of Cardiac Anesthesia, National Heart Center, Royal Hospital, Muscat, Oman
3. Cardiovascular Research Centre, Biosciences Institute, Newcastle University, Newcastle Upon Tyne, United Kingdom
4. Cardiovascular Research Center, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio, USA