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Gradual improvements of six-minute walk distance (SMWD) in NXT15906F6 supplemented subjects during the study. The bars represent the mean ± SD of walked distance in meters (m). Placebo (n=29), NXT15906F6-250 (n=30), and NXT15906F6-400 (n=30); * indicates significance p<0.0001; intragroup comparison between baseline and the respective days of evaluations using t-test.
