Biology, 24.06.2019 02:20 coollid876
The concentration of psa (prostate-specific antigen) in the blood is sometimes used as a screening test for possible prostate cancer in men. the value is normally reported as the number of nanograms of psa per milliliter of blood. a psa of 1.6 ng/ml is considered low. express that value in terms of the units shown.
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