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The study was conducted in accordance with the Declaration of Helsinki (as revised in 2013). The study was approved by the Institutional Research Ethics Board of Tianjin Children\u2019s Hospital (No.W-2025), and we obtained written informed consent from the parents to anonymously publish the relevant information of the children included in this study.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval and consent to participate"}},{"value":"All authors consent to the publication of this manuscript in BMC urology. The manuscript does not contain any identifiable personal data of patients or research participants, or written informed consent for the use of such data has been obtained from all relevant individuals and archived appropriately. All authors have approved the final manuscript, and no conflicts of interest exist.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}}],"article-number":"278"}}