CNBP and Proximal myotonic myopathy: Muscleblind‐like 1 protein no longer binds to CCUG repeat‐expanded cellular nucleic acid‐binding protein (CNBP) RNA connected to type 2 myotonic dystrophy (DM2) pathogenicity as a result of modification of the enlarged intronic CCUG repeats in CNBP, whose expression is linked to DM2 in humans.158