1. Keele Cardiovascular Research Group, Keele University
2. Department of Cardiology, University Hospital of North Midlands
3. Division of Interventional Cardiology, MS Hershey Medical Center, Penn State University, College of Medicine, Heart & Vascular Institute
4. Quebec Heart-Lung Institute, Laval University
5. Cardiology Department, Faculty of Medicine, Aswan University
6. Department of Cardiology, Faculty of Medicine, Cairo University
7. Department of Cardiology, Isala Heart Centre