1. Division of Anatomical Pathology; Department of Pathology; Faculty of Medicine and Health Sciences, Stellenbosch University and NHLS, Tygerberg Academic Hospital; Tygerberg South Africa
2. NHLS; Port Elizabeth South Africa
3. Division of Pulmonology; Department of Medicine; Faculty of Medicine and Health Sciences, Stellenbosch University; Tygerberg South Africa
4. Division of Medical Physiology; Department of Biomedical Sciences; Faculty of Medicine and Health Sciences, Stellenbosch University; Tygerberg South Africa