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Children who were old enough to understand, or the patients\u2019 parents, received a letter informing them of the anonymous use of their medical information in the context of medical research, in accordance with the principles of the Helsinki Declaration. Regulatory approval was obtained from the Research and Innovation Directorate (DRI) of Rennes University Hospital.","order":4,"name":"Ethics","label":"Ethics Approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"No objection consent was obtained from all individual participants of the study or their legal guardians.","order":5,"name":"Ethics","label":"Consent to Participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":6,"name":"Ethics","label":"Consent for Publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Analyses were performed using the\u00a0survival package\u00a0in\u00a0R software (version 3.5-5).","order":7,"name":"Ethics","label":"Code Availability","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Dr Ninon LE GOAZIOU and Dr Catherine DROITCOURT. Analyses were also performed by Dr Florence POIZEAU. The first draft of the manuscript written by Dr Ninon LE GOAZIOU and Dr Catherine DROITCOURT was read and reviewed by all authors. All authors read and approved the final manuscript.","order":8,"name":"Ethics","label":"Author Contributions","group":{"name":"EthicsHeading","label":"Declarations"}}]}}