[1] Kings Coll London, Div Immunol Infect & Inflammatory Dis, MRC Ctr Transplantat, Guys Hosp, London WC2R 2LS, England
[2] Washington Univ, Sch Med, Dept Internal Med, Div Immunol & Pathol, St Louis, MO 63110 USA
[3] Washington Univ, Sch Med, Dept Internal Med, Div Rheumatol, St Louis, MO 63110 USA
[4] Kings Coll London, DIIID, Acad Dept Rheumatol, London, England