1. Speech and Language Pathology Unit, Department of Health and Rehabilitation at the Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
2. Region Västra Götaland, Department of Geriatrics, Neurology and Rehabilitation, Alingsås Hospital, Alingsås, Sweden
3. Region Västra Götaland, Department of Neurology, Sahlgrenska University Hospital, Gothenburg, Sweden
4. Region Västra Götaland, Department of Otorhinolaryngology, Sahlgrenska University Hospital, Gothenburg, Sweden