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King A, Sánchez-Johnsen L, Van Orman S, Cao D, Matthews A.King A, et al. Among authors: matthews a.J Natl Med Assoc. 2008 Feb;100(2):208-17. doi: 10.1016/s0027-9684(15)31209-8.J Natl Med Assoc. 2008.PMID: 18300538
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Asvat Y, Cao D, Africk JJ, Matthews A, King A.Asvat Y, et al. Among authors: matthews a.Am J Public Health. 2014 Sep;104 Suppl 4(Suppl 4):S620-7. doi: 10.2105/AJPH.2014.302097.Am J Public Health. 2014.PMID: 25100429Free PMC article.