Authors: M A D'Agostino; P Conaghan; M Le Bars; G Baron; W Grassi; E Martin-Mola; R Wakefield; J-L Brasseur; A So; M Backhaus; M Malaise; G Burmester; N Schmidely; P Ravaud; M Dougados; P Emery Journal: Ann Rheum Dis Date: 2005-05-05 Impact factor: 19.103