Fig. 3From: Potential urine proteomics biomarkers for primary nephrotic syndromeValidation of candidate biomarkers with ELISA. a C9, b CD14, and c SERPINA1 were measured by sandwich ELISA in a validation set. The ELISA levels were normalized to urine creatinine (µg/mg). *p < 0.05 versus IgAN, †p < 0.05 versus MNBack to article page