Funding for this research was provided by:
German Innovationsfonds (01VSF16032)
Received: 7 July 2020
Accepted: 2 December 2020
First Online: 19 December 2020
Ethics approval and consent to participate
: Prior to inclusion, all participants had to sign a written informed consent form. Written informed consent was also obtained from a parent or guardian for all minor participants under the age of 18. The study was approved by the ethical committee of the Ludwig-Maximilians-Universität München (reference number 17-431) and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The study was also reviewed by the data protection officer of the Ludwig-Maximilians-Universität München.
: Not applicable.
: The authors declare that they have no competing interests.