1. Department of Internal Medicine, Section of Infectious Diseases and Department of Medical Microbiology and Infectious Diseases, Erasmus MC, University Medical Center , Rotterdam , The Netherlands
2. Department of Viroscience, Erasmus MC, University Medical Center , Rotterdam , The Netherlands
3. Department of Internal Medicine, Medical Center Leeuwarden , Leeuwarden , The Netherlands
4. Department of Internal Medicine, Rijnstate Hospital, Arnhem , The Netherlands
5. Department of Internal Medicine, Amphia Hospital , Breda , The Netherlands
6. Department of Internal Medicine, Groene Hart Gouda , Gouda , The Netherlands
7. Department of Biostatistics, Erasmus MC, University Medical Center , Rotterdam , The Netherlands
8. Department of Epidemiology, Erasmus MC, University Medical Center , Rotterdam , The Netherlands