| http://www.w3.org/ns/prov#value | - Assuming 2 L of urine is excreted in 24 hr, the concentration of NNAL in the 24 hr urine of non-smokers was about 10 pg/mL in the Schubert study.PAHs are products of incomplete combustion of organic materials, including tobacco, and some, such as benzo[a]pyrene, are potent carcinogens.
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