CXCL13 and congenital isolated hyperinsulinism: Plasma levels of CXCL13 were significantly elevated in ART-naive EHI (137.3 ± 67.4 pg/mL) and ART-naive CHI (385.91 ± 76.8 pg/mL) compared to EC (71.3119.0 pg/mL) and UC (33.414.9 pg/mL) (Figure 1A).