1. Clinical Epidemiology Laboratory, Faculty of Nursing, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. Directorate of Operational Preparedness for Public Health Emergencies, Greek Ministry of Health, 10433 Athens, Greece
3. Department of Social Welfare, Education and Equality, Municipality of Katerini, 60133 Katerini, Greece
4. Department of Nursing, School of Health Sciences, International Hellenic University, 57001 Thessaloniki, Greece
5. Nursing Department (Didimoteicho Branch), International Hellenic University, 57400 Thessaloniki, Greece
6. Laboratory of Exercise, Health and Human Performance, Applied Sport Science Postgraduate Program, Department of Life Sciences, School of Sciences, European University Cyprus, Nicosia P.O. Box 22006, Cyprus
7. Department of Health Sciences, School of Sciences, European University Cyprus, 6, Diogenes Str. Engomi, CY-2404, Nicosia P.O. Box 22006, Cyprus