1 Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
2 Division of Anatomical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
3 National Health Laboratory Service, Tygerberg, Cape Town, South Africa.
4 Division of Medical Virology, Faculty of Medicine and Health Science, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
5 Division of Forensic Medicine, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
6 Department of Pediatric Radiology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
7 Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.