1. Nephrology Unit, Internal Medicine Department, Kasr Alainy School of Medicine, Cairo University, Giza, Egypt
2. Endocrinology Unit, Internal Medicine Department, Faculty of Medicine, Fayoum University, Faiyum, Egypt
3. Rheumatology and Rehabilitation Department, Kasr Alainy School of Medicine, Cairo University, Giza, Egypt
4. Critical Care Medicine Department, Internal Medicine Department, Kasr Alainy School of Medicine, Cairo University, Giza, Egypt
5. Endocrinology Unit, Internal Medicine Department, Kasr Alainy School of Medicine, Cairo University, Giza, Egypt
6. Critical Care Medicine, Theodor Bilharz Research Institute, Cairo, Egypt
7. Fresenius Medical Care Hungary, Cegléd, Hungary
8. Department of Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
9. Department of Surgery, Division of Transplant, Medical University of South Carolina, Charleston, SC, USA