Stamatis Karakatsanis1, Sotirios G Papageorgiou2, Michail Michail3, Maria K Angelopoulou4, Christina Kalpadakis5, Theoni Leonidopoulou6, Eirini Katodritou7, Maria Kotsopoulou8, Ioannis Kotsianidis9, Eleftheria Hatzimichael10, Eleftheria Lakiotaki11, Dimitrios Boutsis12, George Karianakis13, Argiris Symeonidis14, Maria Gavriatopoulou15, Panayiotis Panayiotidis16, Kostas Konstantopoulos4, Themis Karmiris17, Gerassimos A Pangalis18, Theodoros P Vassilakopoulos19. 1. Third Department of Internal Medicine, National and Kapodistrian University of Athens, Sotiria Hospital, Athens, Greece. 2. Second Department of Internal Medicine, Propaedeutic, Hematology Unit, National and Kapodistrian University of Athens, University General Hospital "Attikon", Athens, Greece. 3. Department of Hematology, Nicosia General Hospital, Nicosia, Cyprus. 4. Department of Hematology and Bone Marrow Transplantation, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece. 5. Department of Hematology, University of Crete, Iraklion, Crete, Greece. 6. Department of Hematology, Sismanoglion General Hospital, Athens, Greece. 7. Department of Hematology, Theagenion Anticancer General Hospital, Thessaloniki, Greece. 8. Department of Hematology, Metaxa Anticancer Hospital, Piraeus, Greece. 9. Department of Hematology, Democritus University of Thrace, Alexandroupolis, Greece. 10. Department of Hematology, University of Ioannina, Ioannina, Greece. 11. First Department of Pathology, National and Kapodistrian University of Athens, Athens, Greece. 12. Department of Hematology, Athens Navy Hospital, Athens, Greece. 13. Department of Hematology, HYGEIA Hospital, Athens, Greece. 14. Hematology Division, Department of Internal Medicine, University of Patras, Patras, Greece. 15. Department of Therapeutics, National and Kapodistrian University of Athens, Alexandra Hospital, Athens, Greece. 16. First Propedeutic Department of Internal Medicine, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece. 17. Department of Hematology and Lymphoma, Evangelismos General Hospital, Athens, Greece. 18. Department of Hematology and Bone Marrow Transplantation, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece; Department of Hematology, Athens Medical Center, Psychikon Branch, Athens, Greece. 19. Department of Hematology and Bone Marrow Transplantation, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece. Electronic address: tvassilak@med.uoa.gr.