1. Netherlands Institute for Health Services Research , Utrecht , The Netherlands
2. Department of Health Sciences, University of Florence , Florence , Italy
3. Centre for Global Health, Usher Institute, University of Edinburgh , Edinburgh , United Kingdom
4. Statens Serum Institut , Copenhagen , Denmark
5. Department of Methods Development and Analytics, Norwegian Institute of Public Health , Oslo , Norway
6. Centre for Infectious Disease Control, National Institute for Public Health and the Environment , Bilthoven , The Netherlands
7. School of Public Health, Nanjing Medical University , Nanjing , China
8. Department of Pediatrics, University of Turku and Turku University Hospital , Turku , Finland
9. Sanofi Vaccines , Lyon , France