1. Division of Otorhinolaryngology; Department of Clinical Sciences; Umeå University; Umeå Sweden
2. Division of Speech and Language Pathology; Department of Clinical Sciences; Umeå University; Umeå Sweden
3. Division of Neurology; Department of Pharmacology and Clinical Neurosciences; Umeå University; Umeå Sweden
4. Division Neurophysiology; Department of Pharmacology and Clinical Neurosciences; Umeå University; Umeå Sweden