2.8. Quality of evidence

PM Peifen Ma
BW Bo Wang
JZ Jun Zhang
XS Xiping Shen
LY Liping Yu
XD Xinman Dou
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The quality of evidence for the main outcomes will be assessed using the Grading of Recommendations Assessment, Development, and Evaluation,[23] which contains 4 levels: high level, moderate level, low level, and very low level. Flaws in study design, inconsistency, imprecision, indirectness, and publication bias will be investigated.

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