New bone formation accelerates during lower limb lengthening and deformity correction in children with Ollier's disease.

"Declarations Ethics approval and consent to participateThe authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. The study was conducted in accordance with the Declaration of Helsinki (as revised in 2013). The study was approved by the institutional ethics board of Children’s Hospital of Fudan University [no. (2022) 150], and individual consent for this retrospective analysis was waived. All the authors have approved the final contents of the submission, been actively involved in the planning and enactment of the study, and have also assisted with the preparation of the submitted article. Consent for publicationThe article has not been submitted elsewhere. The authors have read the submission guidelines and the paper conforms to this guide in all respects. We, the authors of this submission, confirm that we have not published the same or a very similar study with the same or very similar results and major conclusions in any other journals. These include English- or non-English-language journals and journals that are indexed or not indexed in PubMed, regardless of different words being used in the article title, introduction, and discussion. All the authors have approved the final contents of the submission, been actively involved in the planning and enactment of the study, and have also assisted with the preparation of the submitted article. The authors of this submission understand that dual submission refers to publication in any language and that dual submission will result in academic sanctions which will include the blocking of all authors to prevent their future submissions to Journal of Orthopaedics and Traumatology. Competing interestsThe authors declare no potential competing interest with respect to the research, authorship, and/or publication of this article. Competing interests The authors declare no potential competing interest with respect to the research, authorship, and/or publication of this article."

"Funding Supported by the Science and Technology Commission of Shanghai Municipality (CN) (nos. 20Y11912900 and 22Y11912200)."