1. College of Medicine, King Saud University; Department of Surgery and Peripheral Vascular Disease Research Chair; P.O.Box 7805(37) Riyadh Saudi Arabia 11472
2. College of Medicine, King Saud University; Sheikh Abdullah S. Bahamdan Research Chair for Evidence-Based Health Care and Knowledge Translation; P.O. Box 68639 Riyadh Central Saudi Arabia 11537
3. LKSKI St. Michael's Hospital; Applied Health Research Centre; 10 Queens Quay - 1211 Toronto Ontario Canada M5J2R9
4. College of Medicine, King Saud University; Department of Family & Community Medicine, Holder of "Shaikh Abdullah S. Bahamdan" Research Chair for Evidence-Based Health Care and Knowledge Translation; P.O.Box 2925 Riyadh Saudi Arabia 11461