1. Departments of Pediatrics
2. Nijmegen University Center for Infectious Diseases
3. Medical Microbiology, Rikshospitalet University Hospital, Oslo, Norway
4. Department of Medical Microbiology and Infectious Diseases, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
5. Pediatrics
6. Medical Microbiology, University Medical Center St. Radboud