Platelet fatty acid content. There is no difference between CF and control platelets with regard to AA, DHA, or their ratio (A-B); however, CF platelets have increased Mead acid (20:3 n-9) and 22:5 n-6 fatty acid concentrations compared with control platelets (C). Data are mean ± SEM; n = 11 CF patients and n = 10 healthy controls. ^*P < .05 versus control platelets.