1. Family and Community Medicine Department, Qassim University, P.O. Box 143, Buraidah 51411, Saudi Arabia
2. Biostatistics Department, University Diabetes Center, King Saud University, P.O. Box 245, Riyadh 11411, Saudi Arabia
3. Registry Department, University Diabetes Center, King Saud University, P.O. Box 245, Riyadh 11411, Saudi Arabia
4. Research Department, University Diabetes Center, King Saud University, P.O. Box 245, Riyadh 11411, Saudi Arabia
5. University Diabetes Center, King Saud University, P.O. Box 18397, Riyadh 11415, Saudi Arabia