1. Department of Rheumatology, Faculty of Medicine, Al Azhar University, Assiut, Egypt
2. Department of Rheumatology and Rehabilitation, Faculty of Medicine, Al Azhar University, Cairo, Egypt
3. Department of Internal Medicine, Faculty of Medicine, Taibah University, Medina, Saudi Arabia
4. Department of Rheumatology and Rehabilitation, Faculty of Medicine, Benha University, Benha, Egypt