Anti-Ro52 antibodies frequently co-occur with anti-Jo-1 antibodies in sera from patients with idiopathic inflammatory myopathy - Rutjes,S.A.; Vree Egberts,W.T.; Jongen,P.; Van Den Hoogen,F.; Pruijn,G.J.; Van Venrooij,W.J. (Clin Exp Immunol, 1997)