Fig. 1.

Flowchart of patient selection. Wallace criteria are defined as having no joints with active arthritis; no fever, rash, serositis, splenomegaly or generalized lymphadenopathy attributable to JIA; no active uveitis; erythrocyte sedimentation rate or C-reactive protein levels within normal limits, and a best possible score for the physician’s global assessment of disease activity on the scale used. JIA juvenile idiopathic arthritis, MRI magnetic resonance imaging