1. UCT/MRC Genomic and Precision Medicine Research Unit, Division of Human Genetics, Department of Pathology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences University of Cape Town Cape Town South Africa
2. Department of Human Genetics, National Health Laboratory Servicexs Groote Schuur Hospital Cape Town South Africa
3. Division of Chemical Pathology, Department of Pathology University of Cape Town Cape Town South Africa
4. Division of Anatomical Pathology, Department of Pathology University of Cape Town Cape Town South Africa
5. Sydney Brenner Institute for Molecular Bioscience, Division of Human Genetics, National Health Laboratory Service, School of Pathology, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
6. Division of Otorhinolaryngology, Department of Surgery, Faculty of Health Sciences University of Cape Town Cape Town South Africa
7. Department of Paediatrics, Chris Hani Baragwanath Academic Hospital and School of Clinical Medicine, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa