1 Division of Allergology and Clinical Immunology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
2 Allergy and Immunology Unit, University of Cape Town Lung Institute, Cape Town, South Africa.
3 The Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Stellenbosch, South Africa.
4 The Modelling and Simulation Hub, Africa, Department of Statistical Sciences, University of Cape Town, Cape Town, South Africa.
5 Faculty of Health Sciences, Division of Dermatology, Department of Medicine, University of Stellenbosch, Cape Town, South Africa.
6 Faculty of Health Sciences, Division of Dermatology, Department of Medicine, University of Cape Town, Cape Town, South Africa.