KDR and juvenile idiopathic arthritis: We demonstrated that lowest CD34 + CD309+ cell levels were found in these JIA patients who received combination of GC, etanercept and metothrexate (0.0035% [0.0015%-0.019%] vs. 0.05% [0.014%-0.13%]; p = 0.024 for JIA and healthy subjects, respectively).