Changes in CD34+ cells and MVD after TBI. (A) Dynamic changes of post-traumatic MVD of TBI group and control group. By two-way ANOVA, significant difference was shown in the effects of injury (F=116.94, p<0.001) and time (F=25.23, p<0.001) on MVD number, and interaction (F=19.20, p<0.001) between injury and time. Post hoc test (LSD) further indicated that MVD number in TBI rats were significantly higher than that in controls except at baseline and 24h after TBI (*p<0.01 compared with control at the same time point; Student t test; n=14). (B) Common pattern of changes in CD34+ cells and CD34+ MVD in the injured tissue.