1. Centre for Global Health, University of Edinburgh , Edinburgh , United Kingdom
2. Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut , Copenhagen , Denmark
3. Finnish Institute for Health and Welfare , Helsinki , Finland
4. Turku University Hospital , Turku , Finland
5. Fondazione Penta for the Treatment and Care of Children with HIV and Related Diseases , Padova , Italy
6. National Institute for Public Health and the Environment, Centre for Infectious Disease Control , Bilthoven , the Netherlands
7. Department of Methods Development and Analytics, Norwegian Institute of Public Health , Oslo , Norway
8. School of Public Health, Nanjing Medical University , Nanjing , China
9. Department of Clinical Research, Nordsjælland Hospital Hilleroed and University of Southern Denmark , Odense , Denmark
10. Department of Pediatrics, University of Turku , Turku , Finland
11. Department of Infection Control and Vaccines, Norwegian Institute of Public Health , Oslo , Norway
12. Division of Pediatric Infectious Diseases, Department for Women’s and Children’s Health, University of Padua , Padua , Italy