资料提炼：共收集到相关文献54篇，按上述标准纳入12篇，其余文献均被排除。
DATA EXTRACTION: Altogether 54 correlated literatures were collected, according to above accepting criteria, there were 12 articles included and rest literatures were excluded.
资料提炼：共收集到符合上述要求的文献62篇，排除28篇重复性研究。34篇符合纳入标准。
DATA EXTRACTION: There were 62 literatures in accordance with the criteria, 28 repeated ones were excluded, and 34 articles met the inclusion criteria.
资料提炼：共收集到符合上述要求的文献40篇，排除27篇重复性研究，13篇符合纳入标准。
DATA EXTRACTION: There were 40 literatures in accordance with the above criteria, 27 repetitive studies were excluded, and 13 were accorded with the inclusive criteria.
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