Requirements for abstracts differ among journals, so the target journal's instructions for authors should be consulted for specific details.
不同期刊对摘要的撰写要求有所不同，因此应参照目标杂志的《稿约》了解具体要求。
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。
Level of evidence: Prognostic level II. See Instructions to Authors for a complete description of levels of evidence.
证据等级：预后II级。见作者须知中有关证据等级的具体说明。
Level of evidence: Prognostic level I. See Instructions to Authors for a complete description of levels of evidence.
可信度水平：预测类I级，可信度水平的具体描述见稿约。
Level of evidence Prognostic level II. See Instructions to Authors for a complete description of levels of evidence.
二级预后。见作者证据水平的完整描述的说明。
Level of evidence Therapeutic level I. See Instructions to Authors for a complete description of levels of evidence.
治疗水平I。证据等级的完整描述见投稿须知。
Level of evidence Therapeutic level II. See Instructions to Authors for a complete description of levels of evidence.
证据等级治疗II级。作者对证据等级详细描述见后。
Level of evidence Therapeutic level III. See Instructions to Authors for a complete description of levels of evidence.
II I级治疗标准，证据级别完整说明见作者说明。
Level of evidence: Therapeutic level IV. See Instructions to Authors for a complete description of levels of evidence.
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 III. See Instructions to Authors for a complete description of levels of evidence.
证据水平：治疗II I级。对证据水平的详尽描述见投稿须知。
Level of evidence: Therapeutic level III. See Instructions to Authors for a complete description of levels of evidence.
证据水平：治疗II I级。对证据水平的详尽描述见投稿须知。
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