National and Kapodistrian University of Athens Medical School - Endocrine Unit and Diabetes Center, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit, National and Kapodistrian University of Athens Medical School - Endocrine Unit and Diabetes Center, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit, National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit and National and Kapodistrian University of Athens Medical School - Hematology and Oncology Unit