1. Clinical Biochemistry Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
2. Medical Biochemistry Department, National Research Centre, Cairo, Egypt
3. Cardiology Department, Faculty of Medicine, McGill University, Canada
4. Clinical Biochemistry Department, Faculty of Medicine, Alexandria University, Egypt
5. Cardiology Department, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
6. Main Laboratory, Al Quwayiyah General Hospital, Al Quwaiiyah, Saudi Arabia