Inclusion and exclusion criteria.
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资源简介：
a World Bank (2012). Country and Lending Groups, Low and Lower Middle Income countries [cited August 29, 2013]; Available from: http://data.worldbank.org/about/country-classifications/country-and-lending-groups. b World Health Organization (WHO). Humanitarian Health Action Dictionary. 2013 [cited August 29, 2013]; available from: http://www.who.int/hac/about/definitions/en/index.html. Inclusion and exclusion criteria.
创建时间：
2015-09-23
