P Goussard1, H Rabie1, J Morrison1, P T Schubert2. 1. Department of Pediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Tygerberg, South Africa. 2. Department of Pathology, Division of Anatomical Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Tygerberg, South Africa.