1. Department of Nordic Studies and Linguistics, University of Copenhagen, Copenhagen, Denmark
2. School of Medical Sciences, Division of Dentistry, University of Manchester, Greater Manchester, UK
3. Liverpool Clinical Trials Centre, University of Liverpool, a Member of Liverpool Health Partners, Liverpool UK
4. Manchester Centre for Audiology and Deafness, School of Health Sciences, University of Manchester, Manchester, UK
5. Manchester Academic Health Science Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
6. Institute of Neuroscience and Physiology, Department of Health and Rehabilitation, Speech- and Language Pathology Unit, The Sahlgrenska Academy at University of Gothenburg, Gothenburg Sweden
7. Department of Otorhinolaryngology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden