1. Department of Otorhinolaryngology; Head and Neck Surgery, Maastricht University Medical Center; Maastricht the Netherlands
2. Emergency Department; Erasmus Medical Center; Rotterdam the Netherlands
3. Department of Methodology and Statistics; Care and Public Health Research Institute, Maastricht University; Maastricht the Netherlands
4. Department of Psychiatry and Psychology; Maastricht University Medical Center; Maastricht the Netherlands