Affiliation: | 1. Department of Infectious Diseases, Chelsea and Westminster Hospital, London, UK;2. Respiratory Medicine, Homerton Hospital, London, UK;3. Department of Rheumatology, Ealing Hospital, Southall, UK;4. Department of Rheumatology, Hammersmith Hospital, London, UK;5. Department of Rheumatology, Imperial College Healthcare NHS Trust, London, UK |