1. Division of Medical Microbiology and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
2. Department of Internal Medicine, Radboud University Medical Center, Nijmegen, the Netherlands.
3. Division of Ear, Nose, and Throat Surgery, Radboud University Medical Center, Nijmegen, the Netherlands.
4. Division of Oral and Maxillofacial Surgery, Radboud University Medical Center, Nijmegen, the Netherlands