Fig. 3From: Neonatal screening and genotype-phenotype correlation of hyperphenylalaninemia in the Chinese populationMean serum Phe concentrations over time by age group (age < 6 years vs. age ≥ 6 years) for cPKU (A), mPKU (B), and MHP (C) patients. ***, P < 0.001; error bars represent SEMBack to article page