1. Division of Human Genetics Department of Pathology University of Cape Town Cape Town South Africa
2. Department of Paediatrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon
3. Paediatrics Unit Division of Paediatric Neurology Gynaeco‐Obstetric and Paediatric Hospital Yaoundé Cameroon
4. National Health Laboratory ServiceGroote Schuur Hospital Cape Town South Africa
5. Division of Paediatric Cardiology, Mother and Child Hospital Yaoundé Cameroon
6. Department of Medicine University of Cape Town Cape Town South Africa