MTUS2 and cardiomyopathy: Four variants, c.302G>C/p.Gly101Ala (CAPN1), c.637C>T/p.Arg213Trp (MTUS2), c.457C>T/p.Arg153Cys (CRTAC1), c.1309G>T/p.Gly437Cys (UNC45A), were associated with cardiomyopathies.