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The study was conducted in accordance with the Declaration of Helsinki, and informed consent has been waived by the ethics committee of Saint Paul\u2019s Hospital Millennium Medical College due to the retrospective nature of the study. A scanned copy of the approval letter can be provided by the corresponding author upon request.","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"}},{"value":"Not applicable.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Clinical trial number"}}],"article-number":"402"}}