[1] Karolinska Inst, Stockholm, Sweden
[2] Whittington Hosp NHS Trust, London, England
[3] Univ Paris, Paris, France
[4] Univ Manchester, Manchester, Lancs, England
[5] Romanian League Rheumatism, Bucharest, Romania
[6] Maastricht Univ, Med Ctr, Maastricht, Netherlands
[7] Univ Liverpool, Liverpool, Merseyside, England
[8] Med Univ Vienna, Vienna, Austria