1. St George's, University of London; PHRI; London UK
2. Lancaster University; Lancaster Health Hub; Lancaster UK
3. Sheffield Teaching Hospitals; Department of Respiratory Medicine; Sheffield UK
4. Athabasca University; Faculty of Health Disciplines; Edmonton AB Canada
5. University of Alberta; Department of Emergency Medicine; Room 1G1.43 Walter C. Mackenzie Health Sciences Centre 8440 112th Street Edmonton AB Canada T6G 2B7
6. University of Alberta; School of Public Heath; Edmonton Canada
7. St George's, University of London; Cochrane Airways, Population Health Research Institute; London UK SW17 0RE
8. Cardiff University; Department of Child Health, The Division of Population Medicine, The School of Medicine; Cardiff UK