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(A) Representative echocardiograph images for PBS, GelMA-O5, GelMA-O5/rGO and GelMA-O5/rGO/UCMSCs, sham operation groups at 28 days post-injection. (B) Comparative analysis of LV ejection fraction (EF) at days 7, 14 and 28 post-injection. (C) Comparative analysis of fractional shortening (FS) at days 7, 14 and 28 post-injection. (*) P < 0.05, (**) P < 0.01 and (***) P < 0.001.
