NRG1 and myocardial infarction: Abbreviations: AAV9, adeno-associated virus 9; BMP4, bone morphogenetic protein 4; CDC, cardiosphere-derived cell; CM, cardiomyocyte; CPC, cardiac progenitor cell; ESC-CM, embryonic stem cell-derived cardiomyocyte; FSTL1, Follistatin-like 1; HGF, hepatocyte growth factor; iCM, induced cardiomyocyte-like cells; IGF-1, insulin-like growth factor 1; iPSC-CM, induced pluripotent stem cell-derived cardiomyocyte; LVEF, left ventricular ejection fraction; MI, myocardial infarction; miR, microRNA; modRNA, modified RNA; NRG-1, neuregulin-1; Tβ4, thymosin β4.