1. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
2. Department of Epidemiology, National Institute of Public Health – National Institute of Hygiene (NIZP-PZH), Warsaw, Poland
3. State District Sanitary Inspectorate, Pulawy, Poland
4. State Regional Sanitary Inspectorate, Lublin, Poland