%0 Journal Article %T Rheumatoid factor positive polyarticular juvenile idiopathic arthritis associated with a novel COPA mutation %A Bader-Meunier, Brigitte %A Bustaffa, Marta %A Iskounen, Thinhinane %A Carter, Edwin %A Marsh, Joseph A %A Baujat, Geneviève %A Crow, Yanick J %A Frémond, Marie-Louise %J Rheumatology %V 60 %N 5 %P e171-e173 %@ 1462-0324 %D 2020-12-02 %I Oxford University Press %~ DeepDyve