DMD and Duchenne muscular dystrophy: Klimczak et al. reported that a co-transplantation of BM-MSCs and MuSCs directly into the dystrophic muscles of 3 DMD patients aged 11–22 years enhances electromyography parameters, reduces creatine kinase levels, normalizes pro-inflammatory cytokines, and restores dystrophin expression at up to 6 months after co-transplantation (Klimczak et al., 2020).