1. European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
2. Santé publique France, Saint Maurice, France
3. European Food Safety Authority (EFSA), Parma, Italy
4. Centre for Disease Prevention and Control of Latvia, Riga, Latvia
5. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
6. Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
7. Norwegian Institute of Public Health, Oslo, Norway
8. Ministry of Health, Rome, Italy