Exclusive criteria: repetitive study was excluded.
排除标准：排除重复性研究。
Totally 190 literatures were screened out by computer, according to inclusive and exclusive criteria, 25 documents were involved for analysis.
计算机初检得到190篇文献，根据纳入排除标准，对其中25篇文献进行分析。
Exclusive criteria: review, nursing papers, western medicine papers, introduced methods papers, experience of clinical application papers, survey research papers.
排除标准：排除综述类文献、护理类文献、西医类文献、方法介绍类文献、临床体会类文献、调查研究类文献。
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