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The study protocol was reviewed and approved by the Institutional Review Board of The First Affiliated Hospital of Sun Yat-sen University. Given the retrospective design and use of de-identified data, the requirement for informed consent was waived by the Institutional Review Board.","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":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"43"}}