(C) Immunohistochemistry showing fetal myosin expression in muscle biopsy of DMD patients performed 2 months after the last MAB infusion. The staining was performed in tibialis anterior muscle for Pt 01, Pt 02 and Pt 03 and in gastrocnemius muscle for Pt 05 and Pt 06. A higher number of positive (brownish staining) fibers (representing regenerating fibers) were observed in Pt 02, Pt 05 and Pt 06. 