CLCN1 and myotonic dystrophy type 1: A comprehensive study to understand CLCN1 splicing in DM1 skeletal muscle tissue revealed the existence of aberrantly spliced CLCN1 mRNAs with premature stop codons that arise due to retention of intron 2, inclusion of exon 6b and/or exon7a, and exclusion of exons 6 and 7 [167].