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Collins SE, Malone DK, Clifasefi SL.Collins SE, et al. Among authors: clifasefi sl.Am J Public Health. 2013 Dec;103 Suppl 2(Suppl 2):S269-74. doi: 10.2105/AJPH.2013.301312. Epub 2013 Oct 22.Am J Public Health. 2013.PMID: 24148063Free PMC article.