Funding for this research was provided by:
“Förderprogramm für Forschung und Lehre” (FöFoLe) of the Medical Faculty of the LMU Munich (Reg.-Nr. 800/788)
Text and Data Mining valid from 2019-11-29
Received: 9 July 2019
Accepted: 30 October 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Medical Faculty of the LMU Munich (Project 482–12) and all procedures were in accordance with the latest version of the Declaration of Helsinki. Prior to participation, written informed consent was obtained from all participants and their parents/legal guardians after a comprehensive explanation of the study procedures.
: Not applicable.
: The authors declare that they have no competing interests.