Authors: T Sokka; H Kautiainen; T Pincus; S Toloza; G da Rocha Castelar Pinheiro; J Lazovskis; M L Hetland; T Peets; K Immonen; J F Maillefert; A A Drosos; R Alten; C Pohl; B Rojkovich; B Bresnihan; P Minnock; M Cazzato; S Bombardieri; S Rexhepi; M Rexhepi; D Andersone; S Stropuviene; M Huisman; S Sierakowski; D Karateev; V Skakic; A Naranjo; E Baecklund; D Henrohn; F Gogus; H Badsha; A Mofti; P Taylor; C McClinton; Y Yazici Journal: Ann Rheum Dis Date: 2009-07-30 Impact factor: 19.103