1. Doctoral School, Silesian Medical University in Katowice, 15 Poniatowskiego St., 40-055 Katowice, Poland
2. Department of Human Nutrition, Department of Dietetics, Faculty of Public Health in Bytom, Silesian Medical University in Katowice, 19 Jordana St., Zabrze-Rokitnica, 41-808 Katowice, Poland
3. Department of Epidemiology, Faculty of Public Health in Bytom, Silesian Medical University in Katowice, 41-902 Bytom, Poland
4. Department of Public Health, Faculty of Public Health in Bytom, Silesian Medical University in Katowice, 41-902 Bytom, Poland
5. Student Scientific Circle, Department of Public Health, Faculty of Public Health in Bytom, Silesian Medical University in Katowice, 41-902 Katowice, Poland