1. Department of Community Health Sciences, College of Applied Medical Science, Riyadh, KSA
2. Department of Biochemistry, College of Science, King Saud University, Riyadh, KSA
3. University Diabetes Center, King Abdulaziz University Hospital, Riyadh, KSA
4. First Department of Pediatrics, University of Athens Medical School, Children’s Hospital Aghia Sophia, Athens, Greece