CFI , expressing collateral flow during coronary occlusion relative to normal antegrade flow during vessel patency , changed from 0.21 + / -0.14 to 0.31 + / -0.23 in the GM-CSF group ( P < 0.05 ) and from 0.30 + / -0.16 to 0.23 + / -0.11 in the placebo group ( P = NS ) .
