1. European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
2. Karolinska Institutet, Stockholm, Sweden
3. National Institute of Public Health and the Environment, Bilthoven, the Netherlands
4. Health Protection Surveillance Centre, Dublin, Ireland
5. Norwegian Institute of Public Health, Oslo, Norway
6. Robert Koch Institute, Berlin, Germany
7. Public Health Agency of Sweden, Solna, Sweden
8. Institute for Health and Welfare, Helsinki, Finland
9. National Reference Centre for Hepatitis A, Paul Brousse Hospital, Villejuif, France
10. Public Health England, London, United Kingdom
11. Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
12. National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
13. Statens Serum Institut, Copenhagen, Denmark
14. National Centre of Infectious and Parasitic Diseases, Sofia, Bulgaria
15. Istituto Superiore di Sanità (ISS), Rome, Italy
16. Norwegian University of Life Sciences, Oslo, Norway
17. Institut de Veille Sanitaire (InVS) region Picardy, Amiens, France
18. National Virus Reference Laboratory, Dublin, Ireland
19. Regensburg University Medical Center, Regensburg, Germany
20. Food Safety Authority of Ireland, Dublin, Ireland