1. Department of Family Medicine, University of Maastricht , Maastricht, P.O. Box 616, 6200 MD Maastricht , The Netherlands
2. Department of Dermatology, Maastricht University Medical Centre+ , Maastricht, P.O. Box 616, 6200 MD Maastricht , The Netherlands
3. Department of Dermatology, Catharina Ziekenhuis , Eindhoven, P.O. Box 1350, 5602 ZA Eindhoven , The Netherlands
4. Department of Medical Microbiology, Stichting PAMM , Veldhoven, 5504 DL Veldhoven , The Netherlands
5. Department of Medical Microbiology, Maastricht University Medical Centre+ , P.O. Box 5800, 6202 AZ Maastricht , The Netherlands
6. National Institute for Public Health and the Environment (RIVM), Centre for Infectious Disease Control , P.O. Box 1, 3720 BA Bilthoven , The Netherlands
7. Department of Internal Medicine, Catharina Ziekenhuis , P.O. Box 1350, 5602 ZA Eindhoven , The Netherlands
8. Department of Infectious Diseases, Leiden University Medical Center , P.O. Box 9600, 2300 RC Leiden , The Netherlands