1. Department of Special Needs Education, Faculty of Education, University of Oslo, Oslo, Norway
2. Curtin School of Allied Health, Faculty of Health Sciences, Curtin University, Perth, WA, Australia
3. Department of Otorhinolaryngology and Head and Neck Surgery, Leiden University Medical Centre, Leiden, Netherlands
4. Department of Social Work, Education and Community Wellbeing, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
5. Department of Education, Faculty of Educational Sciences, University of Helsinki, Helsinki, Finland
6. Open University, University of Helsinki, Helsinki, Finland