1. CHILD, Jönköping University, Jönköping, Sweden;
2. School of Education and Communication, Jönköping University, Jönköping, Sweden;
3. Swedish Institute of Disability Research, Jönköping University, Jönköping, Sweden;
4. Centre for Augmentative and Alternative Communication, University of Pretoria, Pretoria, South Africa;
5. Institute of Health and Care Sciences, University of Gothenburg, Gothenburg, Sweden