DMD and Duchenne muscular dystrophy: We examined four more loci, including Duchenne muscular dystrophy (DMD) exon 53 and DMD exon 44 (537 kb away from each other), the 5′ coding region of HBB and an intergenic locus intragenic 1 (GRCh38.p13, chromosome 20, 32752960–32752979).