1. Department of Speech-Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa;
2. Department of Otorhinolaryngology Head and Neck Surgery, University of Kwazulu Natal, Durban, South Africa;
3. Durban Cochlear Implant Program, Durban, South Africa;
4. Johannesburg Cochlear Implant Centre, Johannesburg, South Africa;
5. Speech-Language Audiology Department, Ghent University, Ghent, Belgium