1. Department of Intensive Care Medicine, Spaarne Gasthuis, 2035 RC Haarlem, The Netherlands
2. Department of Intensive Care Medicine, Erasmus MC University Medical Centre, 3015 GD Rotterdam, The Netherlands
3. Regional Public Health Laboratory Kennemerland, 2035 RC Haarlem, The Netherlands
4. Department of Internal Medicine, Spaarne Gasthuis, 2035 RC Haarlem, The Netherlands
5. Department of Intensive Care Medicine, Diakonessenhuis, 3582 KE Utrecht, The Netherlands
6. Department of Medical Microbiology and Immunology, Diakonessenhuis, 3582 KE Utrecht, The Netherlands
7. Department of Viroscience, Erasmus MC University Medical Centre, 3015 GD Rotterdam, The Netherlands
8. Department of Paediatrics, Spaarne Gasthuis, 2035 RC Haarlem, The Netherlands