1. Department of Haematology and Bone Marrow Transplantation, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, 17 Ag. Thoma Str., 11527 Athens, Greece
2. First Department of Internal Medicine, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, 17 Ag. Thoma Str., 11527 Athens, Greece
3. First Department of Internal Medicine Propedeutic, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, 17 Ag. Thoma Str., 11527 Athens, Greece
4. Second Department of Surgery Propedeutic, National and Kapodistrian University of Athens, Laikon General Hospital, 11527Athens, Greece
5. Second Department of Internal Medicine, National and Kapodistrian University of Athens, Ippokration General Hospital, 11527 Athens, Greece