1. Department of Medical Statistics & Epidemiology, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
2. Department of Public Health, Weill Cornell Medical College, P.O. Box 3050, Doha, Qatar
3. Department Evidence for Population Health Unit, School of Epidemiology and Health Sciences, The University of Manchester, Manchester, UK
4. Department of Endocrinology, Hamad General Hospital, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
5. Qatar Diabetic Association and Qatar Foundation, P.O. Box 752, Doha, Qatar
6. Qatar Foundation Research Division, P.O. Box 5825, Doha, Qatar
7. Division of Diabetes, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA