K. Sagheb and E. Schiegnitz contributed equally to this work.

Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany

K. Sagheb, E. Schiegnitz, M. Moergel, C. Walter, B. Al-Nawas & W. Wagner

Mediplus, Oral and Maxillofacial Surgery, Private Praxis, Mainz, Germany

C. Walter

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KS, ES, MM, CW, BA-N, and WW made substantial contributions to the conception or design of the work, or the acquisition, analysis, or interpretation of the data for the work, and drafted the work or revised it critically for important intellectual content. KS, ES, MM, CW, BA-N, and WW had an agreement to be accountable for all the 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. All authors gave final approval of the version to be published.