1. Nivel, Netherlands Institute for Health Services Research, Utrecht, the Netherlands
2. Centre for Infectious Diseases Research, Diagnostics and laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
3. Centre for Health Security and Communicable Disease Control, The Directorate of Health, Reykjavik, Iceland
4. Virology Department, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, HCL, Lyon, France
5. Department of Clinical Microbiology, Landspitali University Hospital, Reykjavik, Iceland
6. Oxford-Royal College of General Practitioners Research and Surveillance Centre, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
7. Centre for Infectious Diseases, Epidemiology and Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
8. Faculty of Medicine, University of Iceland, Reykjavik, Iceland
9. Children’s Hospital, Reykjavik, Iceland