Text and Data Mining valid from 2019-09-10
First Online: 10 September 2019
Compliance with ethical guidelines
: M.C. von Eiff, W. von Eiff, A. Roth and M. Ghanem declare that they have no competing interests.
: This study was conducted at a university clinic, department of orthopedics, traumatology and plastic surgery. Authorization was granted by the administration of the department. All data related to this study did not include patient, personnel or department-specific data. Also, the works council consented to the study.