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Arylesterase activity in individuals homozygous for both polymorphisms associated with either high or low plasma-PON1 activity. For −108CC/−162AA, N=14 and mean = 140.9 U/ml; for −108TT/−162GG, N=89, mean = 67.5 U/ml, and P<.001 (t-test). (Data available on request from the corresponding author.)
