| Affiliation: | 1. Department of Paediatrics and Child Health, Red Cross War Memorial Children's Hospital, Cape Town, South Africa;2. MRC Unit, Child and Adolescent Lung Health, Cape Town, South Africa;3. Division of Epidemiology and Biostatistics, School of Public Health and Family, University of Cape Town, Cape Town, South Africa;4. Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary;5. Queensland Children's Medical Research Institute, University of Queensland, Perth, Western Australia, Australia |
