[1] INSAF Respiratory Research Institute,North West Interstitial Lung Disease Unit
[2] University Hospital of South Manchester,Department of Medicine and Pediatrics
[3] Wythenshawe Hospital,Department of Family and Community Medicine
[4] Manchester Academic Health Science Centre,Department of Respiratory Medicine
[5] The University of Manchester,undefined
[6] Penn State University,undefined
[7] University of Toronto,undefined
[8] Primary Care Respiratory Research,undefined
[9] Observational and Pragmatic Research Institute,undefined
[10] Family Physician Airways Group of Canada,undefined
[11] Cork University Hospital,undefined
[12] University College Cork,undefined