DYSF and limb-girdle muscular dystrophy: In comparisons of the degree of fatty infiltration, patients with LGMD-R1-calpain3-related had more severe posterior thigh muscle fatty infiltration than those with LGMD-R2-dysferlin-related, but only adductor longus fatty infiltration significantly differed between the subtypes (P < 0.05) (Additional File 3: Figure S2).