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In a prospectively-defined analysis examining the effects on subjects with poorer lung function as determined by a ratio of partial pressure arterial oxygen and fraction of inspired oxygen (PaO2/FiO2) of <150, the difference between MultiStem treatment and placebo was greater than that observed in the intent to treat population. There was 25% mortality in MultiStem group vs. 50% in placebo group, 14.6 VF days in MultiStem group vs. 8.0 VF days in placebo group, and 11.4 ICU-free days in MultiStem group versus 5.9 ICU-free days in placebo group. The median values of the data set were 18.5 VF days for the MultiStem treated patients compared to 3.5 VF days for the placebo group and 12.5 ICU-free days for MultiStem patients compared to 1 ICU-free day for the placebo group.