[1] Univ Oxford, Nuffield Dept Orthopaed Rheumatol & Musculoskelet, Oxford, England
[2] Hosp Badalona Germans Trias & Pujol, IrsiCaixa AIDS Res Inst, HIV Unit, Infect Dis Dept,CIBERINFEC, Badalona, Spain
[3] Univ Oxford, Oxford, England
[4] Erasmus MC Univ, Rotterdam, Netherlands