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The Transitie Project, hosted at the academic hospital Radboudumc, approved the use of their data for this research. Retrospective research on patient files requires adherence to the Personal Data Protection Act. Therefore the data were anonymized and processed in a secure research environment.As determined by the Central Committee on Research Involving Human Subjects (the national medical-ethical review committee, ), this research does not fall under the scope of the Medical Research Involving Human Subjects Act (WMO), as no research subjects were physically involved in this study, nor were the data gathered for the sake of this research. Therefore, no further ethics approval was required. For more information, we refer the reader to .","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Publisher\u2019s Note"}}],"article-number":"36"}}