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Average values for LV end-diastolic (LVEDD; A) and end-systolic (LVESD; B) diameters are depicted for 18- and 28-mo-old mice (n = 15 mice/age group) before and after 4 exposure days each for 3 h/day to either filtered air (FA) or CB. *P < 0.05, vs. preexposure; †P < 0.05, 28 mo vs. 18 mo.
