1. Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
2. Department of Applied Educational Science, Umeå University, Umeå, Sweden
3. Department of Speech Language Pathology, Åbo Akademi University, Turku, Finland
4. Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
5. Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
6. Department of Electrical and Photonics Engineering, Denmark Technical University, Lyngby, Denmark
7. Department of Otorhinolaryngology – Head and Neck Surgery, Turku University Hospital, Turku, Finland