MERTK and myocardial infarction: Our findings are consistent with previous reports that MERTK is necessary for cardiac repair after myocardial infarction and that mesenchymal stem cells promote cardiac repair by activating phagocytic pathways in cardiac macrophages, strengthening the causal association between tissue‐resident skeletal muscle macrophage function and muscle satellite cell proliferation (DeBerge et al., 2017; Vagnozzi et al., 2020; Zhang et al., 2019).