Up-regulated cardiac IL-22R expression in AVMC, chronic myocarditis and DCM. A. Representative IL-22R immunohistochemistry images in heart tissue (Dark brown granules, original magnification × 400). B. Morphometric quantitation of cardiac IL-22 protein. C. Correlation of the percentage of splenic Th22 cells with cardiac IL-22R. *p < 0.05, **p < 0.01. Data are the means ± SD.