1. Radiation Oncology Unit, First Department of Radiology, Medical School, Aretaieion Hospital, National and Kapodistrian University of Athens (NKUOA), Athens, Greece
2. Department of Pathology, Aretaieion University Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
3. Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, UK
4. Radiation Oncology Unit, Second Department of Radiology, School of Medicine, Rimini 1, National and Kapodistrian University of Athens, Athens, Greece