1. Department of Otorhinolaryngology and Head & Neck Surgery Hospital of the Ludwig‐Maximilians‐University Munich Germany
2. Department of Otorhinolaryngology and Head & Neck Surgery Ninewells Hospital Dundee UK
3. School of Medicine University of Dundee Dundee UK
4. Dundee Epidemiology and Biostatistics Unit (DEBU) Population Health Sciences (PHS) The Medical School University of Dundee Dundee UK
5. Tayside Medical Science Centre (TASC) University of Dundee Dundee UK