does cigarette smoke cause pollution If You Live in a Big City You Already Every Day|Politics & Society|2018-05-09|web only The World Health Organization (WHO)
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[DOI] [PubMed] [Google Scholar] Zhang L, Samet J, Caffo B, Punjabi NM
Thirty percent reported using it within the last 30 days

Some 13,000 U.S

PMID 24460753

The ADHD/Smoking trial was conducted by the Clinical Trials Network of the National Institute on Drug Abuse