Stimulated blood flow was higher in the ICT vs ST group with significantly increased perfusion units ( PU ) for : ACh ( @ PU -LSB- @-@ @ PU -RSB- vs @ PU -LSB- @-@ @ PU -RSB- , p < @ ) ; SNP ( @ PU -LSB- @-@ @ PU -RSB- vs @ PU -LSB- @-@ @ PU -RSB- , p = @ ) ; and capsaicin ( @ PU -LSB- @-@ @ PU -RSB- vs @ PU -LSB- @-@ @ PU -RSB- , p < @ ) .