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。
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。
Level of evidence: Therapeutic level IV. See Instructions to Authors for a complete description of levels of evidence.
疾病的有效防治以及如何评价治疗性研究的价值是临床医生十分关注的问题。
Clinicians pay great attention to the effective treatment of patients and how to evaluate the value of an article on therapy in clinical practice.
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