Identification and validation of serum amino acids as diagnostic biomarkers for diabetic peripheral neuropathy

Figure 2 Scatter plots of the serum relative concentrations of amino acids among diabetic peripheral neuropathy patients, type 2 diabetes mellitus patients and normal controls in the training cohort and validation cohort. ^aP < 0.05; ^bP < 0.01; ^cP < 0.001; ^dP < 0.0001; NS: Not significant; TC: Training cohort; VC: Validation cohort (one-way ANOVA).