Received: 30 May 2020
Accepted: 24 May 2021
First Online: 14 August 2021
: Due to the retrospective design of this study, an ethical approval was not mandatory according to the local academic guidelines of the University of Hamburg.
: All authors gave written consent for publication in the Head&Face Journal.All participant of the current study gave their written informed consent to the Study.
: All authors declare that they have no competing interests.