1. Department of Infectious Diseases, Public Health Service Amsterdam
2. Department of Dermatology, University of Amsterdam
3. Department of Internal Medicine, Academic Medical Center, University of Amsterdam
4. DDL Diagnostic Laboratory, Rijswijk, the Netherlands
5. Infections and Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
6. Department of Pathology, Vrije Universiteit-University Medical Center, Amsterdam
7. Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven
8. Department of Dermatology, Onze Lieve Vrouwe Gasthuis (OLVG)
9. Department of Internal Medicine, Diagnostisch Centrum (DC) Klinieken
10. Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, the Netherlands