1. Department of Radiotherapy—Oncology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece
2. Radiation Oncology Unit, 1st Department of Radiology, Aretaieion University Hospital, 11528 Athens, Greece
3. Cancer Immunology and Immunotherapy Center, Cancer Research Center, Saint Savas Cancer Hospital, 11522 Athens, Greece
4. Laboratory of Biology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece