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Departments of *Radiotherapy §Medical Physics, School of Health Sciences, Faculty
of Medicine, University of Thessaly †Department of Radiation Oncology, University
Hospital of Larissa, Larissa, Thessaly ‡1st Department of Radiology-Radiotherapy Unit
#2nd Department of Radiology-Radiotherapy Unit, School of Medicine, Kapodistrian University
of Athens ¶2nd Department of Surgery, St Savvas Anticancer Hospital of Athens, Athens
∥Department of Radiotherapy-Oncology, Democritus University of Thrace-Medical School,
Alexandroupolis, Greece.