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Hankey S, Marshall JD.Hankey S, et al. Among authors: marshall jd.Curr Environ Health Rep. 2017 Dec;4(4):491-503. doi: 10.1007/s40572-017-0167-7.Curr Environ Health Rep. 2017.PMID: 29052114Review.
Marshall JD, Brauer M, Frank LD.Marshall JD, et al.Environ Health Perspect. 2009 Nov;117(11):1752-9. doi: 10.1289/ehp.0900595. Epub 2009 Jul 20.Environ Health Perspect. 2009.PMID: 20049128Free PMC article.