1. School of Chemistry, University of Bristol, Bristol, United Kingdom
2. Department of Respiratory Medicine, Royal Brompton Hospital, London, United Kingdom
3. Department of Respiratory Medicine, Chelsea and Westminster Hospital, London, United Kingdom
4. National Heart and Lung Institute, Imperial College London, United Kingdom
5. Infection Sciences, North Bristol NHS Trust, Bristol, United Kingdom
6. MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
7. Intensive Care Unit, North Bristol NHS Trust, Bristol, United Kingdom