All children had an I-FGF23 concentration within the normal range, but I-FGF23 concentration was higher in LC+ children than in BD children (BD=25.7 (19.2, 34.5), LC+=34.3 (22.8, 51.5), and LC−=28.2 (19.6, 40.7) pg/ml; P=0.05) (Table 1). Here, FGF23 is linked to Behcet disease.