Instructions for authors 投稿须知 ; 稿约 ; 作者须知 ; 作者指南
Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.
治疗性研究IV级。具体分级标准见关于证据分级的完整描述。
Level of evidence: Therapeutic level II. See Instructions to Authors for a complete description of levels of evidence.
证据等级：治疗性II级。详见作者对证据级别完整描述的说明。
Level of evidence: Therapeutic level IV. See Instructions to Authors for a complete description of levels of evidence.
证据等级：治疗性研究IV级。关于证据等级的完整描述详见投稿须知。
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