University of Cape Town (UCT) - Department of Paediatric Rheumatology, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, Lagos State University, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital, University of Cape Town (UCT) - Red Cross War Memorial Children’s Hospital and University of Cape Town (UCT) - Groote Schuur Cardiac Clinic