(B) Haematoxilin and Eosin staining of muscle biopsies from Pt 05 and Pt 06 performed one month before the first MAB infusion and 2 months after the last MAB infusion. Images show diffuse increase of connective tissue, atrophic and hypertrophic fibers, degenerating fibers, and diffuse centralization of nuclei. No evident differences were observed between biopsy performed after and before treatment. 