1. Rheumatic Fever Clinic, Department of Cardiology, Red Cross Children’s Hospital, School of Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
2. Department of Neurology, Red Cross Children’s Hospital, School of Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
3. Department of Nuclear Medicine, Red Cross Children’s Hospital, School of Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
4. Department of Paediatrics and Child Health, Stellenbosch University, Paediatric Cardiology Service of the Western Cape, South Africa