1. Department of Respiratory Medicine, Royal Free London NHS Foundation Trust, London, United Kingdom;
2. Division of Pulmonary and Critical Care, Miller School of Medicine, University of Miami, Miami, Florida;
3. Center for Global Non-Communicable Disease Research and Training and
4. Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Maryland;
5. Makerere Lung Institute, Makerere University, Kampala, Uganda;
6. Department of Statistical Science, University College London, London, United Kingdom;
7. Department of Community Medicine, Kathmandu Medical College, Kathmandu, Nepal;
8. Facultad de Medicina Humana, Centro de Investigación del Envejecimiento, Universidad de San Martin de Porres, Lima, Peru;
9. Facultad de Ciencias de la Salud, Universidad Cientíifica del Sur, Lima, Peru;
10. Cardiopulmonary Physiotherapy Laboratory, Federal University of Sao Carlos, Sao Carlos, Brazil;
11. CRONICAS Centre of Excellence in Chronic Diseases and
12. Department of Medicine, School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru;
13. Centre for Health Economics, University of York, York, United Kingdom;
14. Child Health Research Project, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal; and
15. UCL Respiratory, University College London, London, United Kingdom