1. Pain Relief and Palliative Care Unit, Department of Radiology, Areteion Hospital, School of Medicine, University of Athens, Greece
2. Pain Relief and Palliative Care Unit, Department of Radiology, Areteion Hospital, School of Medicine, University of Athens, 27 Korinthias Street 115 26 Athens, Greece;
3. Aeginition Hospital, School of Medicine, University of Athens, Greece
4. Nursing Faculty, University of Athens, Greece
5. Radiotherapy Department, University of Thessaloniki, Greece
6. Pain Relief and Palliative Care Unit, Department of Radiology, Areteion Hospital, School of Medicine