(D) Summary of ARSA activity in the injected and contralateral hemispheres of NHPs in study group 1 and study group 2. Number of tissue blocks analysed: 51 (UT/LV.GFP), 105 (study group 1, injected hemisphere), 52 (study group 1, contralateral hemisphere); 103 (study group 2, injected hemisphere), 72 (study group 2, contralateral hemisphere). One-way ANOVA and Tukey's multiple comparison tests, *** p< 0.001 versus UT/LV.GFP, §p<0.05 versus study group 1. 