Antinuclear antibody positive patients should be grouped as a separate category in the classification of juvenile idiopathic arthritis.

Ravelli A;Varnier GC;Oliveira S;Castell E;Arguedas O;Magnani A;Pistorio A;Ruperto N;Magni-Manzoni S;Galasso R;Lattanzi B;Dalprà S;Battagliese A;Verazza S;Allegra M;Martini A.

2011-01-01