1. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden.
2. Directorate of Epidemiological Surveillance and Intervention for Infectious Diseases, National Public Health Organization (NPHO), Athens, Greece.
3. Regional Public Health Laboratory (PEDY) of Thessaly, Larissa, Greece.
4. Department of Medicine, Laboratory of Hygiene and Epidemiology, University of Thessaly, Larissa, Greece.
5. Regional Directorate of North Aegean, Hellenic Food Authority (EFET), Mytilini, Greece.