In each group, respectively, ERFE showed an increasing trend during the first year of life (Fig. 2 ) and ERFE was significantly higher at 12 months compared to 6 weeks of age in all 3 groups ( p < 0.001).
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In each group, respectively, ERFE showed an increasing trend during the first year of life (Fig. 2 ) and ERFE was significantly higher at 12 months compared to 6 weeks of age in all 3 groups ( p < 0.001).