1. Faculty of Public Health, Department of Preventive Medicine; University of Debrecen; Debrecen Hungary
2. Faculty of Medicine, Department of Biophysics and Cell Biology; University of Debrecen; Debrecen Hungary
3. MTA-DE Public Health Research Group of Hungarian Academy of Sciences; University of Debrecen; Debrecen Hungary
4. European Centre on Health of Societies in Transition; London School of Hygiene and Tropical Medicine; London United Kingdom