CELF1 and familial dilated cardiomyopathy: Because the overexpression of CELF1 (Koshelev et al, 2010) and the loss of MBNL1 (Lee et al, 2013) also result in DCM in mice, Drosophila appears well‐suited to assessing the impact of reduced miR‐1 in DM1‐associated DCM.