Six-minute walk test improved in the bone marrow mononuclear cells group ( 348.0093.51 m at baseline to 370.4191.56 m at 12 months , P = 0.66 ) and there was a non-significant decline in the control group ( 361.2590.78 m to 330.00123.42 m after 12 months , P = 0.66 ) .