Authors: Klaus P Machold; Marcus D Köller; Stephan Pflugbeil; Christof Zimmermann; Ernst Wagner; Ulrike Stuby; Daniel Aletaha; Tanja A Stamm; Franz Mayrhofer; Attila Dunky; Josef Hermann; Wilfried Ilias; Josef S Smolen Journal: Ann Rheum Dis Date: 2007-01-04 Impact factor: 19.103