MKI67 and Duchenne muscular dystrophy: Ki67 expression was significantly higher in LPA-treated DMD-iPSC-CMs than in untreated DMD-iPSC-CMs (without LPA vs. 1 μmol/L LPA, 33 ± 9% vs. 48 ± 8%, P < 0.05, Fig. 6C,D).