MYOD1 and myotonic dystrophy type 1: In this study, five MyoD-hiPSC lines (two control-hiPSC lines: 414C2, 409B2 and three DM1-hiPSC lines: Patient-1 (Pt-1), Patient-2 (Pt-2) and Patient-3 (Pt-3)) were induced to differentiate into myocytes to recapitulate DM1 phenotypes of skeletal muscles according to a previously reported method18 (Fig. 1a).