Predictive factors and repetition numbers for intraoperative additional resection of initially involved soft tissue resection margins in oral squamous cell carcinoma: a retrospective study.

"Declarations Ethics approval and consent to participateThis retrospective study was approved by the local ethics committee of the Medical Faculty of RWTH Aachen University (EK 039-20). The local ethics committee of the Medical Faculty of RWTH Aachen University allowed us to waive the requirements for securing consent to participate from the participants of this human-based study. All methods were in accordance with the Declaration of Helsinki. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open Access funding enabled and organized by Projekt DEAL. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors."