Funding for this research was provided by:
Received: 28 August 2020
Accepted: 7 July 2021
First Online: 6 August 2021
: The study was performed in accordance with the Declaration of Helsinki. The ethics committee of the Ludwig-Maximilians University (LMU) of Munich, Germany approved the study. All participants gave written informed consent prior to our study. For participants under 16 years old written informed consent was obtained from a parent or guardian. The recorded data was irreversibly anonymised.
: Not applicable.
: The authors declare no conflict of interest.