证据水平：治疗类iv级，证据水平的完整描述祥见本刊稿约。

Level of evidence: Therapeutic level IV. See Instructions to Authors for a complete description of levels of evidence.

youdao

证据水平：治疗类iv级，证据水平的完整描述祥见本刊稿约。

Level of evidence: Therapeutic level IV. See Instructions to Authors for a complete description of levels of evidence.

youdao