1. Clinical Pathology Department, Faculty of Medicine, Helwan University, Giza, Egypt
2. Clinical and Chemical Pathology Department, Faculty of Medicine, Cairo University, Cairo,EGYPT
3. Rheumatology and Rehabilitation Department, Faculty of Medicine, Cairo University., Giza, Egypt
4. Health Radiation Research Department, National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority. Giza, Egypt
5. Internal Medicine Department, Faculty of Medicine, Cairo University., Giza, Egypt
6. Ophthalmology Department, Nasser Institute Hospital., Giza, Egypt