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Parasympathetic nerve promotes PST expression in the regenerating glands. (A) Immunohistochemistry (IHC) of polysialyltransferases IV (PST) in the different groups. Scale bar = 20μm. (B) Relative IHC expression levels of PST at different times. (C) PST mRNA levels in glands in the different groups. *** indicates significance at P < .001, **P < .01, *P < .05, ns for no significant. Data were shown as mean ± standard deviation
