Characterization of healthy and DCM iPSC-CMs by (A) flow cytometry for expression of cardiac Troponin T with corresponding health and DCM iPSC-CM sheets (scale bars are 100 μm) and (B) immunostaining for expression of Troponin T and α-actinin. Evaluation of ECM coating materials under strain by (C) cell viability, (D) cell area, and (E) cell density of healthy iPSC-CMs. * P<0.05, † P<0.01, ‡ P<0.001, scale bars = 20μm