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(a) Confocal micrograph of fabricated LbL cardiac tissue surrogates showing cell distribution and tissue surrogates thickness after 1 week in culture (n = 4). (b) LBL tissue surrogates beat-rate over the first 6 d during culture, p < 0.05, (n = 11). H&E staining of LbL tissue surrogates at Day 7 (c)–(e), and Day 28 (f )–(h) of culturing.
