[1] Addenbrookes Hosp, Vasculitis & Lupus Unit, Cambridge, England
[2] Leiden Univ, Dept Pathol, Med Ctr, Leiden, Netherlands
[3] Klinikum Offenbach GmbH, Med Klin 3, Klin Nephrol & Rheumatol, Offenbach, Germany
[4] Univ Birmingham, Div Immun & Infect, Birmingham, W Midlands, England
[5] Lund Univ, Dept Nephrol, S-22101 Lund, Sweden
[6] Lund Univ, Dept Clin Pharmacol, Lund, Sweden
[7] Univ Oxford, Nuffield Dept Orthopaed Rheumatol & Musculoskelet, Oxford, England
[8] Hop Cochin, Serv Med Interne, F-75674 Paris, France
[9] Univ London Imperial Coll Sci Technol & Med, Div Med, London, England
[10] Rigshosp, Dept Otolaryngol, DK-2100 Copenhagen, Denmark