1. First Department of Surgery, National & Kapodistrian University of Athens, Laikon General Hospital, Athens, 115 27, Greece
2. Department of Medical Oncology, Metaxa Cancer Hospital, Athens, 185 37, Greece
3. Second Department of Medical Oncology, Agios Savas Anticancer Hospital, Athens, 115 22, Greece
4. Molecular Oncology Unit, Department of Biological Chemistry, National & Kapodistrian University of Athens, Athens, 115 27, Greece
5. Hematology Oncology Unit, Fourth Department of Internal Medicine, National & Kapodistrian University of Athens, Attikon University Hospital, Athens, 124 62, Greece