DMD and Duchenne muscular dystrophy: The N/C ratio in DMD-iPSC-CMs was lower than that of Con-iPSC-CMs and Ed-DMD-iPSC-CMs (2.88 ± 0.34 vs. 1.67 ± 0.24 vs. 2.31 ± 0.19, P < 0.01; Fig. 2D–F).