Funding for this research was provided by:
Received: 24 March 2021
Accepted: 8 October 2021
First Online: 4 November 2021
: The study was approved by the local ethics committee of the University of Würzburg on October 20<sup>th</sup> 2015 (Vote number 167/15). All participants and their legal guardians gave verbal assent and written informed consent.
: With signing the consent form, participants and their legal guardians agreed to anonymized publication of their data in scientific talks and papers.
: The authors declare that they have no competing interests.