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Bopp M, Kaczynski AT, Besenyi G.Bopp M, et al. Among authors: kaczynski at.Prev Med. 2012 Mar-Apr;54(3-4):237-41. doi: 10.1016/j.ypmed.2012.01.016. Epub 2012 Feb 1.Prev Med. 2012.PMID: 22327047
Kaczynski AT, Glover TD.Kaczynski AT, et al.J Public Health (Oxf). 2012 Aug;34(3):382-9. doi: 10.1093/pubmed/fds011. Epub 2012 Feb 29.J Public Health (Oxf). 2012.PMID: 22378942Free PMC article.