blood test for tobacco use show up Can a non-smoker fail a nicotine test due to secondhand smoke exposure? Smoking before a blood test?
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Lopez-Meyer P, Patil Y, Tiffany T, Sazonov E (2013) Detection of hand-to-mouth gestures using a RF operated proximity sensor for monitoring cigarette smoking

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doi: 10.1073/pnas.1616070114, PMID: [DOI] [PMC free article] [PubMed] [Google Scholar] 194.Liu C, Xu X, Bai Y, Wang TY, Rao X, Wang A, et al

Int J Androl 30:137143