1. Laboratory of Pathology, Department of Flow Cytometry, Center for Cancer Research, NCI, NIH, Bethesda, MD, USA
2. Department of Hematopathology, Ohio State University Wexner Medical Center, Columbus, OH, USA
3. Hematology Branch, NHLBI, NIH, Bethesda, MD, USA
4. Walter Reed National Military Medical Center, Bethesda, MD, USA
5. Clinical Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt