Over 1 year , the Minnesota Living With Heart Failure score improved with MSCs ( -6.3 ; 95 % CI , -15.0 to 2.4 ; repeated measures of variance , P = .02 ) and with BMCs ( -8.2 ; 95 % CI , -17.4 to 0.97 ; P = .005 ) but not with placebo ( 0.4 ; 95 % CI , -9.45 to 10.25 ; P = .38 ) .