1. Pain Relief and Palliative Care Unit, Department of Radiology, Areteion Hospital, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
2. Nursing University of Peloponnese, Sparta, Peloponnese, Greece
3. Psychology Department, Sismanoglio General Hospital, Marousi, Athens, Greece
4. Department of Radiology, Areteion Hospital, National and Kapodistrian University of Athens School of Medicine, Athens, Greece