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Informed consent was obtained from all patients. All procedures were performed following the Declaration of Helsinki and its later amendments. This study has been registered in Chinese Clinical Trial Registry (ChiCTR2200060588).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"All authors have read and approved the final version of the manuscript, and consent to its submission for publication in BMC Gastroenterology. We confirm that the content of this manuscript has not been published elsewhere and is not under consideration for publication elsewhere. All co-authors agree with the submission and have given their consent to be listed as authors on this manuscript.","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":"473"}}