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Concentration-response curves to endothelin-1 in GFAs (A and C) and SFAs (B and D). Data are presented as absolute diameter (A and B) and percent possible dilation (C and D). Values are means ± SE; sample size in parentheses. *P < 0.05 vs. OPA; **P < 0.05 for comparison indicated; †P < 0.05 vs. OSED.
