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 Cardiothoracic Surgery, Department of Surgical Sciences Stellenbosch University and Tygerberg Hospital Tygerberg South Africa
3. Department of Pediatric Radiology The Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
4. Department of Radiology, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
5. Division of Anatomical Pathology, Tygerberg Hospital, National Health Laboratory Service, Faculty of Medicine and Health Sciences Stellenbosch University Cape Town South Africa
6. Department of Obstetrics and Gynaecology, Tygerberg Hospital, Faculty of Medicine and Health Sciences Stellenbosch University Cape Town South Africa