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The retrospective study protocol was reviewed and approved by the Institutional Ethics Committee of Tianjin Huan Hu Hospital. Written informed consent was obtained from all individual participants or their legal guardians included in this study.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"The authors affirm that human research participants provided informed consent for publication of the images in Figs.\u00a0\n                      \n                      ,\n                      \n                      ,\n                      \n                      and\n                      \n                      .","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"}},{"value":"Not applicable.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Clinical trial number"}}],"article-number":"445"}}