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Social work [Soc Work] 2006 Jan; Vol. 51 (1), pp. 71-9.Publisher: Oxford University Press Country of Publication: United States NLM ID: 2984852R Publication Model: Print Cited
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American journal of epidemiology [Am J Epidemiol] 2011 Mar 01; Vol. 173 (5), pp. 479-87. Date of Electronic Publication: 2011 Jan 14.Publisher: Oxford University Press Country of Publication: United States NLM ID: 7910653 Publication Model: Print-Electronic