1. Department of Rehabilitation, University of Zimbabwe, Harare, Zimbabwe
2. Department of Social Work, Education and Community Wellbeing, Northumbria University, Newcastle upon Tyne, UK
3. School of Occupational Therapy, Social Work and Speech Pathology, Faculty of Health Sciences, Curtin University, Perth, Australia
4. Department of Otorhinolaryngology and Head and Neck Surgery, Leiden University Medical Centre, Leiden, Netherlands
5. Department Special Needs Education, University of Oslo, Oslo, Norway
6. School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, South Africa
7. Department of Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town, South Africa