1. Institute of Public Health, Department of Health Policy and Management, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland
2. Chair of Epidemiology and Preventive Medicine, Department of Hygiene and Dietetics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
3. Systematic Reviews Unit – Polish Cochrane Branch, Jagiellonian University Medical College, Krakow, Poland
4. Department of Community Health and Epidemiology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
5. Systematic Reviews Unit – Polish Cochrane Branch, Students' Scientific Group of Systematic Reviews, Jagiellonian University Medical College, Krakow, Poland