The ethical requirements of projects mainly involving people must be stamped by the Municipal Health Bureau, and stamped materials, research project plans and related materials, including literature review, need to be submitted. However, the review articles mainly summarize and analyze the existing literature, and do not involve specific experiments or investigations, so ethical review is not needed in most cases.

However, the specific situation needs to be determined according to the submission requirements or relevant regulations. If in doubt, it is best to consult the journal editor or ethics committee.