伦理审查（Ethical Approval）

系统文献综述是对既往文献的回顾和再分析，不涉及直接接触研究对象。因此，无须进行伦理审查及获取知情同意。一般情况下，可以这样写：(https://www.daowen.com)

Ethical approval and informed consent are not required，as the study will be a literature review and will not involve direct contact with patients（或）Ethical approval is not needed as it is a systematic review of published literature.