BACKGROUND: The systematic review was funded by grants from the National Natural Science Foundation of China (No. 81771114 and No. 81970967). The authors have no actual or potential conflicts of interest.
METHODS: Systematic review with meta-analysis of data.
背景:系统综述由国家自然科学基金委员会资助(编号:81771114和编号81970967).作者没有实际或潜在的利益冲突。
方法:系统评价和荟萃分析数据。