1. Professor at The Internal Medicine Department, Endocrine Unit, Faculty of Medicine, Alexandria University, Alexandria, Egypt
2. Professor of Clinical and Chemical Pathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
3. Assistant Lecturer at The Internal Medicine Department, Endocrine Unit, Faculty of Medicine, Alexandria University, Alexandria, Egypt
4. Lecturer at The Internal Medicine Department, Hepatobiliary Unit, Faculty of Medicine, Alexandria University, Alexandria, Egypt