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Male and female internal mammary artery expresses comparable amounts of prostaglandin F2α (PGF 2α) and 6‐keto prostaglandin F1α (PGF 1α). Quantification of the PGF 2α vasoconstrictor metabolite (A) and the 6‐keto PGF 1α vasodilatory metabolite (n=10 women, and n=12 men; B).
