1. EpiConcept, Paris, France
2. These authors contributed equally to this work as first author
3. Robert Koch-Institute, Berlin, Germany
4. National Centre for Epidemiology, Instituto de Salud Carlos III, Madrid, Spain
5. GROG/Open Rome, Paris, France
6. Instituto Nacional de Saude Dr Ricardo Jorge, Lisbon, Portugal
7. European Programme for Intervention Epidemiology Training (EPIET), European
8. Health Protection Surveillance Centre, Dublin, Ireland
9. Universitatea de Medicina si Farmacie Carol Davila, Bucharest, Romania
10. Cantacuzino Institute, National Institute of Research – Development for Microbiology
11. National Institute for Public Health, Warsaw, Poland