1. Division of Hematology & HSCT, Department of Oncology, King Abdul-Aziz Medical City, Riyadh, KSA;
2. King Abdullah International Medical Research Center, Riyadh, KSA;
3. King Saud bin Abdulaziz University for Health Sciences, Riyadh, KSA;
4. Department of Pathology and Laboratory Medicine, King Abdul-Aziz Medical City, Riyadh, KSA