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(A) Micrograph of TGF-β1 immunohistochemical staining in the diaphragmatic peritoneum; (B) Micrograph of phosphorylated Smad2 and Smad3 immunohistochemical staining in the diaphragmatic peritoneum. (a) Peritoneal dialysis and (b) Astragalus high dose groups; DAB was used as a chromogen.
