1. Medical Service Department (MSD), Adult Cardiology, Prince Sultan Cardiac Center, Ministry of Defence , Riyadh , Saudi Arabia
2. Medical Service Department (MSD), Scientific Research Center, Ministry of Defence , P.O. Box: 22454 , Riyadh 11495 , Saudi Arabia
3. Department of Biochemistry, College of Science, King Saud University , Riyadh 11451 , Saudi Arabia
4. Department of Surgery, Prince Sultan Military Medical City, Medical Service Department (MSD), Ministry of Defence , Riyadh , Saudi Arabia
5. Department of Psychiatry, Prince Sultan Military Medical City, Medical Service Department (MSD), Ministry of Defence , Riyadh , Saudi Arabia
6. Dermatology Department, Medical Service Department (MSD), Ministry of Defence , Riyadh , Saudi Arabia
7. Department of ENT, Prince Sultan Military Medical City, Medical Service Department (MSD), Ministry of Defence , Riyadh , Saudi Arabia
8. Department of Dentistry, Prince Sultan Military Medical City, Medical Service Department (MSD), Ministry of Defence , Riyadh , Saudi Arabia
9. Department of Radiology, Prince Sultan Military College of Health Science , Dhahran , Saudi Arabia