Fig. 2

Complexity of miRNAs detected in the sera and exosomes. a Average number of miRNAs expressed in sera and exosomes, different letters (a, b) represent significant difference (P < 0.05). b Principle component analysis of the total detected miRNAs in sera and exosomes (blue dots represent sera, red dots represent exosomes). c Venn diagram showing the profile of miRNAs expressed in sera and exosomes. d Correlation analysis of the commonly expressed miRNAs in sera and exosomes