1. Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Division of Paediatrics, ANS Hospital, Angered, Sweden
3. DART Centre for Augmentative and Alternative Communication and Assistive Technology, Sahlgrenska University Hospital, Gothenburg, Sweden
4. Division of Neonatology, Sahlgrenska University Hospital, Gothenburg, Sweden