Discordance between non-zero physician's global scores and absence of active joints in juvenile idiopathic arthritis: multicenter vs. single-center cohorts. - Rebollo-Giménez AI; Rosina S; Ridella F; Orsi SM; Aldera E; Burrone M; Natoli V; Consolaro A; Bovis F; Naredo E; Ravelli A (Frontiers in pediatrics, 2026)