1. Department of Otorhinolaryngology and Phoniatrics, Head and Neck Surgery Helsinki University Hospital and University of Helsinki Helsinki Finland
2. Department of Psychology and Logopedics, Faculty of Medicine University of Helsinki Helsinki Finland
3. Logopedics, School of Humanities, Philosophical Faculty University of Eastern Finland Joensuu Finland
4. Research Unit of Logopedics University of Oulu Oulu Finland
5. Centre for Advanced Research in Experimental and Applied Linguistics (ARiEAL), Department of Linguistics and Languages McMaster University Hamilton Canada