1. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
2. Academic Unit of Primary Medical Care, University of Sheffield, Sheffield, United Kingdom,
3. Department of Primary Care Medicine, University of Malaysia, Kuala Lumpur, Malaysia,
4. Department of International Public Health, Centre for Respiratory Diseases Research, Kenya Medical Research Institute, Nairobi, Kenya,
5. Department of Respiratory Medicine, Liverpool University Hospitals NHS Foundation Trust, Aintree University Hospital NHs Foundation Trust, Liverpool, United Kingdom,