1. Department of Internal Medicine, Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
2. Department of Medical Microbiology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
3. Department for Health Evidence, Radboud Institute for Health Sciences (RIHS), Radboud University Medical Center Nijmegen, Mailbox 133, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands