1. Department of Renal Medicine, The Royal Hospital, Muscat, Oman
2. Department of Medicine, Oman Medical Specialty Board, Aziabah, Muscat, Oman
3. The Department of Hematology, Sultan Qaboos University Hospital, Muscat, Oman
4. The Department of Hematology, The Royal Hospital, Muscat, Oman
5. Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
6. King Saud University Medical City, Riyadh, Saudi Arabia
7. Department of Nephrology, Dr. Soliman Fakeeh Hospital, Jeddah, Saudi Arabia
8. Department of Medicine, MOHAP, Dubai, United Arab Emirates