1. Department of Paediatrics: Child and Youth Health, The University of Auckland, Auckland, New Zealand
2. School of Population Health, The University of Auckland, Auckland, New Zealand
3. International Union Against Tuberculosis and Lung Disease, Paris, France
4. Department of Paediatric Respiratory Medicine, Hospital Centro de Referencia de Salud El Pino, University of Santiago de Chile, Santiago, Chile
5. Division of Community Health Sciences, St George's, University of London, London, UK