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Nandi A, Tracy M, Aiello A, Des Jarlais DC, Galea S.Nandi A, et al. Among authors: tracy m.Emerg Infect Dis. 2008 May;14(5):825-7. doi: 10.3201/eid1405.071070.Emerg Infect Dis. 2008.PMID: 18439373Free PMC article.
Des Jarlais DC, Galea S, Tracy M, Tross S, Vlahov D.Des Jarlais DC, et al. Among authors: tracy m.Am J Public Health. 2006 Mar;96(3):561-7. doi: 10.2105/AJPH.2004.054742. Epub 2006 Jan 31.Am J Public Health. 2006.PMID: 16449597Free PMC article.
Person C, Tracy M, Galea S.Person C, et al. Among authors: tracy m.J Nerv Ment Dis. 2006 Sep;194(9):659-66. doi: 10.1097/01.nmd.0000235758.24586.b7.J Nerv Ment Dis. 2006.PMID: 16971817Free article.