1. From the Department of Pathology (Hematology Section), King Khalid University Hospital and College of Medicine, King Saud University, Riyadh
2. From the Department of Oncology (Pediatric Hematology-Oncology Section), King Faisal Specialist Hospital and Research Centre, Riyadh
3. From the Department of Pathology (Hematology Section), King Faisal Specialist Hospital and Research Centre, Riyadh
4. From the Department of Medicine (Hematology-Oncology Section), King Khalid University Hospital and College of Medicine, King Saud University, Riyadh