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 Paediatric Pulmonology and Allergology, Department of Paediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
3. Department of Pediatric Radiology, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
4. Department of Surgical Sciences, Division of Cardiothoracic Surgery, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
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 Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA