[1] Univ Dusseldorf, Policlin Rheumatol, Dusseldorf, Germany
[2] Univ Pisa, Dept Clin & Expt Med, Rheumatol Unit, Pisa, Italy
[3] Complexo Hosp Univ Vigo, Hosp Meixoeiro, IBIV, Rheumatol Sect, Vigo, Spain
[4] Univ Lille Nord France, Hop Claude Huriez, Dept Internal Med, Natl Ctr Autoimmune & Syst Dis, Lille, France
[5] Royal Blackburn Hosp, Dept Rheumatol, Blackburn, Lancs, England
[6] Immune Inflammat & Infect Dis Global Franchise Gl, Brentford, England
[7] Adelphi Real World, Adelphi Mill, Bollington, England
[8] IRCCS Arcispedale S Maria Nuova, Sci Directorate, Reggio Emilia, Italy