Comparison of urine cotinine and the tobacco-specific nitrosamine metabolite 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) and their ratio to discriminate active from passive smoking.
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N. Benowitz | M. Goniewicz | P. Jacob | M. Eisner | E. Lazcano-Ponce | Bartosz Koszowski | Christopher M. Havel | A. Sobczak | W. Zielińska-Danch | C. Havel