Stephen Lam1, Pallav L Shah2,3,4. 1. Department of Integrative Oncology, British Columbia Cancer Research Institute and Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada. 2. Department of Respiratory Medicine, Royal Brompton Hospital, London, United Kingdom. 3. Department of Respiratory Medicine, Chelsea & Westminster NHS Foundation Trust, London, United Kingdom. 4. National Heart and Lung Institute, Imperial College London, London, United Kingdom.