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Chang E, Chan KS, Han HR.Chang E, et al. Among authors: chan ks.Med Care. 2014 Sep;52(9):833-41. doi: 10.1097/MLR.0000000000000187.Med Care. 2014.PMID: 25014734
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Chang E, Chan KS, Han HR.Chang E, et al. Among authors: chan ks.Am J Public Health. 2015 Feb;105(2):398-407. doi: 10.2105/AJPH.2014.301950.Am J Public Health. 2015.PMID: 25033147Free PMC article.
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