1. Department of Radiology, Pain Relief and Palliative Care Unit, Areteion Hospital, School of Medicine, National and Kapodistrian University of Athens, Aigaleo, Greece,
2. First Department of Propaedeutic Internal Medicine, Diabetes Center, School of Medicine, National and Kapodistrian University of Athens, Laiko General Hospital, Aigaleo, Greece,
3. Department of Psychiatry, School of Medicine, National and Kapodistrian University of Athens, Eginition Hospital, Aigaleo, Greece,
4. Department of Nursing, University of West Attica, Aigaleo, Greece,