FABP2 and Hypoglycemia: The level of IgA and IgG antibodies to beta-lactoglobulin and the level of I-FABP were compared in children with postnatal hypoglycemia (diagnosed according to locally used guidelines on monitoring neonatal hypoglycemia used in Estonia), in children who required oral formula feeding, and in children without hypoglycemia (Supplementary Table 7 and Supplementary Figures 3, 4A, B).