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Muscle injury-induced senescence. Senescence-associated β-galactosidase (SAβ-gal) staining of the tibialis anterior muscle of a wild-type mouse is shown without injury (left) and 5 days after injury via cardiotoxin (CTX) injection. SAβ-gal-stained cells appear blue. Images are courtesy of Haitao Wang, Ph.D., Mayo Clinic, Rochester, MN, USA).
