1. General Hospital of Volos, 38 222 Volos, Greece
2. Laboratory of Clinical Nursing, Department of Nursing, University of Thessaly, 41 500 Larissa, Greece
3. Department of Nursing, University of West Attica, 122 43 Athens, Greece
4. Department of Nursing, International Hellenic University, 570 01 Thessaloniki, Greece
5. Department of Nursing, School of Health, University of the Peloponnese, 221 00 Tripoli, Greece