1. EpiConcept, Paris, France
2. French Clinical Vaccinology Network (REIVAC)
3. Institut national de la santé et de la recherche médicale (Inserm), CIC BT 505 Cochin Pasteur, Paris, France
4. Cochin hospital, Paris, France
5. Vaccines Research, FISABIO-Public Health, Valencia, Spain
6. Department of Epidemiology, University Medical Centre Groningen, Groningen, the Netherlands
7. Department of Pharmacy, Unit of Pharmaco-Epidemiology & Pharmaco-Economics (PE2), University of Groningen, Groningen, the Netherlands
8. Centro de Investigación Biomédica de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
9. Instituto de Salud Pública de Navarra, Pamplona, Spain
10. Department of Infectious Disease, Catholic University, Rome, Italy
11. Inserm, CIC 1001, Montpellier, France
12. Centre hospitalier régional universitaire (CHRU) Montpellier, Hôpital Saint Eloi, Montpellier, France
13. Department of Epidemiology and Prevention, IRCCS Istituto Neurologico Mediterraneo Neuromed, Pozzilli, Italy
14. Members are listed at the end of the article