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Ethics number: S2020-114-04, and all procedures followed the ethical standards of the institutional and\/or national research councils, as well as the Declaration of Helsinki of 1964 and its later revisions or similar ethical standards in research involving human participants. The need for informed consent was waived by Medical Ethics Committee of Chinese PLA General Hospital due to the retrospective nature of the study and the use of anonymized data.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"All authors have read and approved the content, and agree to submit for consideration for publication in the journal.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"Each authors certifies that there is no conflict of interest.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"The authors declare no competing interests.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"220"}}