1. Hematology Unit, First Department of Internal Medicine Laikon General Hospital, National and Kapodistrian University of Athens Athens Greece
2. Institute of Nuclear and Radiological Sciences National Center for Scientific Research Demokritos Athens Greece
3. Department of Hematology University Hospital of Alexandroupolis Alexandroupoli Greece
4. Haematology Division, Second Department of Internal Medicine Attikon General Hospital, National and Kapodistrian University of Athens Athens Greece
5. Department of Internal Medicine University Hospital of Patras Rio Greece
6. Department of Clinical Hematology 'G. Gennimatas' District General Hospital Athens Greece
7. Department of Hematology 'St Andrew' General Hospital Patras Greece
8. Haematology Laboratory, School of Medicine University of Crete Greece
9. First Propedeutic Department of Internal Medicine, School of Medicine National and Kapodistrian University of Athens Athens Greece
10. Department of Haematology University of Ioannina Ioannina Greece
11. Department of Hematology Larissa University Hospital, University of Thessalia Larissa Greece
12. Department of Hematology Evangelismos Hospital Athens Greece
13. Hematology Laboratory Alexandra General Hospital Athens Greece
14. Department of Hematology Metaxa Anticancer Hospital Piraeus Greece
15. General Hospital of Kalamata Greece
16. Second Department of Internal Medicine National and Kapodistrian University of Athens, Hippokratio General Hospital Athens Greece
17. Department of Hematology 251 General Air‐Force Hospital Athens Greece