1. Department of Health Psychology and Research Methodology, Faculty of Medicine, P. J. Safarik University , Kosice, Slovak Republic
2. Graduate School Kosice Institute for Society and Health, Faculty of Medicine, P. J. Safarik University , Kosice, Slovak Republic
3. Department of Community and Occupational Medicine, University Medical Center Groningen, University of Groningen , Groningen, The Netherlands
4. Institute of Applied Psychology, Faculty of Social and Economic Sciences, Comenius University Bratislava , Bratislava, Slovak Republic