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A: effect of EXT on CB chemoreceptor sensitivity in sham and CHF rabbits. B: slope coefficient (b) for the DF-Po2 relationship in SED-sham, EXT-sham, SED-CHF, and EXT-CHF rabbits. Values are means ± SE; n = 8 in each group. *P < 0.05 vs. SED-sham, #P < 0.05 vs. SED-CHF.
