1. Department of Cardiology, Ibn Albitar Center for Cardiac Surgery, Baghdad, Iraq
2. Department of Pediatric Cardiology, College of Medicine, Kufa University, Najaf, Iraq
3. Department of Pediatric Cardiology, College of Medicine, University of Basrah, Basrah, Iraq
4. Department of Pediatric Cardiology, Ibn Alnafees Center for Cardiac Surgery, Baghdad, Iraq