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Han E, Powell LM, Isgor Z.Han E, et al. Among authors: powell lm.Soc Sci Med. 2012 Jun;74(12):1874-81. doi: 10.1016/j.socscimed.2012.02.032. Epub 2012 Mar 20.Soc Sci Med. 2012.PMID: 22486839
Isgor Z, Powell LM, Wang Y.Isgor Z, et al. Among authors: powell lm.BMC Public Health. 2013 Nov 14;13:1075. doi: 10.1186/1471-2458-13-1075.BMC Public Health. 2013.PMID: 24228687Free PMC article.