DPM2 and muscular dystrophy: In DOLK‐CDG, DPM1‐CDG, DPM2‐CDG, and DPM3‐CDG, biochemical and phenotypic abnormalities overlap with CDG‐I and muscular dystrophy‐dystroglycanopathy, which is caused by reduced O‐mannosylation of alpha‐dystroglycan (αDG).2, 3, 4, 5