1 Department of Thoracic Medicine, The Prince Charles Hospital, Brisbane, Queensland 4032, Australia. Electronic address: [email protected].
2 Royal Free London NHS Foundation Trust, London, UK; UCL Respiratory, Division of Medicine, University College London, London, UK.
3 Department of Immunology, Royal Free Hospital NHS Trust, London, UK; Institute of Immunity and Transplantation, University College London, Royal Free Campus, London, UK.
4 Interstitial Lung Disease Unit, Royal Brompton Hospital, London, UK; Margaret Turner Warwick Centre for Fibrosing Lung Diseases, National Heart and Lung Institute, Imperial College, London, UK.