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Chicago-tyylinen lähdeviittausvan Hedel, Karen, et al. "The Contribution of National Disparities to International Differences in Mortality Between the United States and 7 European Countries." Am J Public Health 2015.
MLA-viitevan Hedel, Karen, et al. "The Contribution of National Disparities to International Differences in Mortality Between the United States and 7 European Countries." Am J Public Health 2015.
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