Received: 28 April 2021
Accepted: 16 September 2021
First Online: 27 September 2021
: This study has been independently reviewed and approved by the Ethics Commission of Landeszahnärztekammer Hessen (No: 03/2020). Our study was conducted in compliance with the appropriate EQUATOR guidelines (STROBE). Patients were approached and were asked to participate in the study after receiving written information regarding the aims and course of the investigation. Patients who provided written informed consent and met the inclusion criteria were included.
: All patients gave their written informed consent for publication of this study.
: Anne Kruse, Vanessa Wild, Petra Ratka-Krüger, Kirstin Vach and Eberhard Frisch declare that they have no competing interests.