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(A) Representative images of proliferation using Ki67 (red) and Brdu (green) staining of fibro-adipogenic progenitors (FAPs) harvested from supraspinatus (SS), paraspinal (PS), gastrocnemius (GA), and tibialis anterior (TA) muscles after 2 weeks of cell culture. (B) Quantification of Ki67 and Brdu FAP proliferation rates for each muscle. *p < 0.05.
