The United States has the worst overall child mortality rate compared to 19 other wealthy nations in the OECD, a new study finds.
원문출처 : http://www.cnn.com/2018/01/08/health/child-mortality-rates-by-country-study-intl/index.html
원문출처 : http://www.cnn.com/2018/01/08/health/child-mortality-rates-by-country-study-intl/index.html