1. Department of Infectious Diseases, CHU Saint-Pierre
2. School of Public Health
3. U-CRI, Université libre de Bruxelles (ULB), Brussels, Belgium
4. Department of Infectious Diseases, CIC-INSERM 1408 Vaccinologie CHU Saint-Etienne, France
5. Department of Paediatrics, Ribeirão Preto Medical School, University of São Paulo, Brazil
6. Department of Paediatrics, CHU Saint-Pierre, Université libre de Bruxelles (ULB), Brussels, Belgium.