DATA SYNTHESIS: Of the 14 articles, 3 were randomized control studies, 8 were control studies, 1 were non-control studies, 1 was gathering analysis, and 1 was long-term follow-up study.
资料综合：14篇文章中3篇为随机对照研究，8篇为对照研究，1篇为非对照研究，1篇为荟萃分析，1篇为长期随访研究。
DATA SYNTHESIS: Of the 14 articles, 3 were randomized control studies, 8 were control studies, 1 were non-control studies, 1 was gathering analysis, and 1 was long-term follow-up study.
资料综合：14篇文章中3篇为随机对照研究，8篇为对照研究，1篇为非对照研究，1篇为荟萃分析，1篇为长期随访研究。
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