1. Academic Medical Center, Department of Internal Medicine, Division of Infectious Diseases, Tropical Medicine and AIDS, Amsterdam, the Netherlands
2. Department of Medical Microbiology, University Medical Centre Groningen, Groningen, the Netherlands
3. Laboratory for Infectious Diseases and Perinatal Screening (LIS), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
4. Department of Medical Microbiology and Infectious Diseases Canisius Wilhelmina Hospital, Nijmegen, the Netherlands
5. Infectious Diseases Section, Department of Medicine, Nijmegen University Center for Infectious Diseases (NUCI), Radboud University Nijmegen, Nijmegen, the Netherlands