1. Rheumatology Department, Assiut University Hospitals, Assiut, Egypt
2. Faculty of Medicine, Department of Internal Medicine, Rheumatology and Clinical Immunology unit, Assiut University, Assiut, Egypt
3. Department of Ophthalmology, Assiut University, Assiut, Egypt
4. Assiut University Hospitals, Assiut University, Assiut Egypt
5. Clinical Pathology Department, Assiut University Hospitals, Assiut, Egypt
6. Department of Diagnostic Radiology, Faculty of Medicine, Assiut University, Assiut, Egypt
7. Rheumatology Department, Faculty of Medicine, Cairo University, Cairo, Egypt