Fig. 3. Smooth muscle content evaluation of each group by Masson's trichrome staining (×100). The graph shows comparison of the smooth muscle and collagen fiber ratios of the different groups. Data are expressed as mean±standard deviation. ^aStatistical significance in comparison with the diabetes mellitus (DM)+extracorporeal shockwave therapy (ESWT) group. ^bStatistical significance in comparison with the DM group.