·2,447,543篇论文数据，部分数据来源于NoteExpress
方法采用文献检索、聚类分析、德尔菲专家咨询等研究方法，遴选中等发达卫生水平指标项目。
Methods Such research methods as information retrieval, cluster analysis, and Delphi expert consultation were used to select index items of medium developed health level.
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