1. Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland
2. Chair of Epidemiology and Preventive Medicine, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
3. Department of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
4. Institute of Economics, Finance and Management, Faculty of Management and Social Communication, Jagiellonian University, Krakow, Poland