SORBS1 and myotonic dystrophy type 1: Expression of U7‐SORBS1‐ESE25 in TA mouse muscles reproduced the exon 25 mis‐splicing observed in DM1 embryonic muscle biopsies, leading to a reduction in exon inclusion of 70.4% ± 2.3% and 49.2% ± 8.1% at 2 and 6 months post‐injection, respectively (Figure 2b).