Muhunthan Thillai BA MRCP PhDLead Clinician, Cambridge Interstitial Lung Unit, Royal Papworth Hospital NHS Foundation Trust, Visiting Senior Research Fellow, University of Cambridge, UKPeter Bailey MBBSSpecialty Registrar in Respiratory Medicine, Royal Papworth Hospital NHS Foundation Trust, Evelyn Trust Fellow, Cambridge, UKKeith Hattotuwa MBBS FRCPConsultant Physician, Senior Lecturer in Respiratory Medicine, Broomfield Hospital, Mid Essex NHS Foundation Trust, Chelmsford, UK