FRG1 and autosomal recessive limb-girdle muscular dystrophy type 2L: Defect or delay in the fusion stage was reported in FRG1 mouse model for FSHD primary myoblasts (Feeney et al., 2015) and limb-girdle muscular dystrophy type 2L (LGMD2L) Ano5−/− knockout mouse model (Whitlock et al., 2018).