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Chen Y, Briesacher BA, Field TS, Tjia J, Lau DT, Gurwitz JH.Chen Y, et al. Among authors: tjia j.Arch Intern Med. 2010 Jan 11;170(1):89-95. doi: 10.1001/archinternmed.2009.469.Arch Intern Med. 2010.PMID: 20065204Free PMC article.