DMD and Duchenne muscular dystrophy: Equimolar amounts of the PMO targeting dystrophin exon 17 (H17A (+61+86)) and PPMO targeting exon 18 (H18A (+24+53)) were transfected into myogenic cells derived from a DMD patient carrying an exon 14–17 duplication in DMD and left for 96 h before RNA and protein were extracted for analysis.