1. Department of Pediatrics, Amalia’s Children Hospital, Radboud University Medical Center, Nijmegen, the Netherlands
2. University Hospital Brussels, Department of Pediatrics, Brussels, Belgium
3. Department of Otorhinolaryngology, Radboud University Medical Center, Nijmegen, the Netherlands
4. Department of Otorhinolaryngology, Maastricht University Medical Center, Maastricht, the Netherlands
5. Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
6. Department of Pharmacy, Radboud University Medical Center, Nijmegen, the Netherlands
7. Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, the Netherlands