1. Department of Integrative Biology and Physiology, Undergraduate Studies University of Minnesota Minneapolis Minnesota USA
2. Division of Pediatric Cardiology, Department of Pediatrics University of Minnesota Minneapolis Minnesota USA
3. Division of Pediatric Cardiovascular Surgery, Department of Surgery, Maria Fareri Children's Hospital Westchester Medical Center Valhalla New York USA
4. Department of Cardiothoracic Surgery, Faculty of Medicine Alexandria University Alexandria Egypt