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Six minute walk test distance achieved at D1 and D10 in Control, ET+Sham and ET+NIV groups. Notes: Open circles: individual distance achieved at D1 and D10. Dark square: mean and standard deviation of distance at D1 and D10. * p < 0.05 vs. Control; † p < 0.05 vs. ET+Sham; ‡ p < 0.05 vs. D1.
