1. Faculty of Health Studies, Jan Evangelista Purkyně University in Ústí nad Labem, 40096 Ústí nad Labem, Czech Republic
2. Faculty of Health, Slovak Medical University in Bratislava, 03401 Banská Bystrica, Slovakia
3. Faculty of Nursing and Professional Health Studies, Slovak Medical University in Bratislava, 83101 Bratislava, Slovakia
4. Division of Public Health, Department of Population Health, Faculty of Health Sciences, Wroclaw Medical University, 51-618 Wroclaw, Poland