[1] Norwich Med Sch, Rheumatol, Norwich, Norfolk, England
[2] Ipswich Hosp, Rheumatol, Ipswich, Suffolk, England
[3] Ankara Univ, Dept Ophthalmol, TR-06100 Ankara, Turkey
[4] Leiden Univ, Med Ctr, Pathol, Leiden, Netherlands
[5] Trinity Coll Dublin, Dublin, Ireland
[6] Linkoping Univ, Nephrol, Linkoping, Sweden
[7] Charles Univ Prague, Nephrol, Prague, Czech Republic
[8] Skane Univ Hosp, Nephrol, Lund, Sweden
[9] Skane Univ Hosp, Nephrol, Malmo, Sweden
[10] Univ Parma, Nephrol, I-43100 Parma, Italy
[11] IDIBAPS, Dept Autoimmune Dis, Rheumatol, Barcelona, Spain
[12] Bichat Claude Bernard Univ Hosp, Pulmonol, Paris, France
[13] Immunol Zentrum, Zurich, Switzerland
[14] Innere Med Klin, Kirchheim Teck, Kirchheim unter Teck, Germany
[15] Rheumazentrum Schleswig Holstein Mitte, Rheumatol, Neumunster, Germany
[16] Univ Kiel, Dept Otorhinolaryngol, Kiel, Germany
[17] Univ Oxford, Rheumatol, Oxford, England
[18] Hop St Louis, Internal Med, Paris, France
[19] Univ Philadelphia, Rheumatol, Philadelphia, PA USA
[20] Vasculitis UK, Patient, Matlock, England
[21] Univ Cambridge, Med, Cambridge, England