1. Food Safety Department; Environment Centre; Helsinki Finland
2. Social and Health Services; Environmental Health; Espoo Finland
3. Health Services; Tampere Finland
4. Clinical Microbiology; Helsinki University Central Hospital; Hospital District of Helsinki and Uusimaa, Laboratory Services, HUSLAB; Helsinki Finland
5. Veterinary Bacteriology Unit; Finnish Food Safety Authority Evira; Kuopio Finland
6. European Union Reference Laboratory for Parasites; Istituto Superiore di Sanità; Rome Italy
7. Food Hygiene Unit; Finnish Food Safety Authority Evira; Helsinki Finland
8. Department for Infectious Disease Surveillance and Control; National Institute for Health and Welfare; Helsinki Finland