1. Department of Laboratory Hematology Athens Regional General Hospital "G. Gennimatas" Athens Greece
2. Department of Clinical Hematology Athens Regional General Hospital "G. Gennimatas" Athens Greece
3. Department of Pediatric Hematology‐Oncology University Hospital of Heraklion Heraklion Greece
4. Department of Pediatric Hematology‐Oncology "Aghia Sophia" Children's Hospital Athens Greece
5. Flow Cytometry Laboratory, Department of Immunology Athens Regional General Hospital "G. Gennimatas" Athens Greece