1. 251 Air Force General Hospital, Orthopedic Department, Athens, Attiki 115 25, Greece
2. Department of Nursing, Hellenic Mediterranean University, Heraklion, Crete 714 10, Greece
3. Department of Nursing, Venizeleio Pananeio General Hospital of Heraklion, Heraklion, Crete 714 09, Greece
4. Department of Social Sciences, Hellenic Open University, Achaia, Patras 263 35, Greece
5. Department of Nursing, School of Health Sciences, Cyprus University of Technology, Limassol 3036, Cyprus