MKI67 and myocardial infarction: Four weeks after MI induction and treatment, hiPSC-CMs were identified in sections from the hearts of AAV6-miR-199a and AAV6-Control animals by expression of the human isoform of cardiac troponin T (hcTnT), proliferation was evaluated via Ki67 expression, and cell-cycle progression was evaluated via PH3 expression.