Amr Hanbali1, Abdulaziz Alrajeh2, Walid Rasheed3. 1. Hematology Department, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia. Electronic address: ahanbali@kfshrc.edu.sa. 2. Hematopathology Department, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia. 3. Hematology Department, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.