[1] UCL, Div Med, Ctr Inflammat & Tissue Repair, UCL Resp, London, England
[2] Univ Coll London Hosp, Dept Rheumatol, London NW1 2PG, England
[3] Univ Coll London Hosp, Hosp Trop Dis, London NW1 2PG, England
[4] Univ Coll London Hosp, Dept Clin Virol, London NW1 2PG, England
[5] Queens Univ Belfast, Wellcome Wolfson Inst Expt Med, Belfast, Antrim, North Ireland
[6] Royal Victoria Hosp, Reg Intens Care Unit, Belfast, Antrim, North Ireland
[7] Sheffield Teaching Hosp NHS Fdn Trust, Dept Rheumatol, Sheffield, S Yorkshire, England
[8] Sheffield Childrens Hosp NHS Fdn Trust, Sheffield, S Yorkshire, England