1. Faculty of Medicine, Internal Medicine-Endocrinology Unit, Cairo University, Cairo, Egypt
2. Faculty of Medicine, Internal Medicine-Vascular Unit, Cairo University, Cairo, Egypt
3. Faculty of Medicine, Gynaecology and Obstetrics Department, Cairo University, Cairo, Egypt
4. Faculty of Medicine, Cairo University, Clinical Pathology, Cairo, Egypt
5. Faculty of Medicine, Internal Medicine Department, Cairo University, Cairo, Egypt