1. Rheumatology & Immunology Unit, Department of Internal Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt
2. Mansoura Manchester Programme for Medical Education, Faculty of Medicine, Mansoura University, Mansoura, Egypt
3. Mansoura Nephrology & Dialysis Unit (MNDU), Department of Internal Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt