1. Department of Health Sciences, Lund University, Lund, Sweden.
2. Department of Otorhinolaryngology, Head and Neck Surgery, Skåne University Hospital, Lund, Sweden.
3. Department of Neurology, Rehabilitation Medicine, Memory Disorders and Geriatrics, Skåne University Hospital, Lund, Sweden.
4. Department of Clinical Sciences, Lund University, Lund, Sweden.