1 Department of Epidemiology, Faculty of Public Health in Katowice, Medical University of Silesia in Katowice, Katowice, Poland.
2 Faculty of Education and Sports, University of Deusto, Bilbao, Spain.
3 Division of Research Methodology, Department of Nursing, Faculty of Nursing and Midwifery, Wroclaw Medical University, Wrocław, Poland.
4 Centre for Cardiovascular Health, Edinburgh Napier University, Sighthill Campus, Edinburgh, United Kingdom.
5 Division of Scientific Research and Innovation in Emergency Medical Service, Department of Emergency Medical, Service, Faculty of Nursing and Midwifery, Wroclaw Medical University, Wrocław, Poland.
6 Group of Research in Care (GRUPAC), Faculty of Health Sciences, University of La Rioja, Logroño, Spain.