1. Department of Nursing, University of West Attica, Athens, Greece
2. Pain Relief and Palliative Care Unit, Department
of Radiology, Areteion Hospital, School of Medicine, National & Kapodistrian University of Athens, Athens, Greece
3. Hellenic Mediterranean University, Heraklion, Greece
4. General Military Hospital of Athens, Athens, Greece
5. Laboratory for Research of the Musculoskeletal System, National & Kapodistrian University of Athens, Kifissia,
Greece