1. Faculty of Health and Well-Being, Turku University of Applied Science, Turku, Finland
2. Department of Nursing Science, University of Turku, Turku, Finland
3. School of Public Health, University of West Attica, Athens, Greece
4. Laboratory of Hygiene and Epidemiology, School of Public Health, University of West Attica, Athens, Greece
5. Institute of Health Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
6. Faculty of Social Sciences, University of Novo Mesto, Slovenia
7. Department of Nursing Care, Faculty of Public Health, Medical University of Plovdiv, Plovdiv, Bulgaria