1. Department of Otorhinolaryngology, Head and Neck Surgery; Oslo University Hospital-Rikshospitalet; Oslo Norway
2. Department of Radiology; Oslo University Hospital-Rikshospitalet; Oslo Norway
3. Department of Orthopedic Surgery; Oslo University Hospital-Ullevål; Oslo Norway
4. Department of Endocrinology; Oslo University Hospital-Aker; Oslo Norway
5. Department of Medical Genetics; Oslo University Hospital-Rikshospitalet; Oslo Norway