Funding for this research was provided by:
Dita Randebrock Stiftung
Text and Data Mining valid from 2020-02-08
Received: 17 June 2019
Accepted: 14 January 2020
First Online: 8 February 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Medical Faculty of the University Hospital Munich. The study was in accordance with the guidelines laid down in the Declaration of Helsinki and in compliance with national legislation. All participants were informed in detail about the design and aims of the study, and gave written assent to participate in the study. Written informed consent was also obtained from at least one parent/legal custodian, after the parent(s)/legal custodian(s) had been informed about all aspects of the study.
: Not applicable.
: The authors declare that they have no competing interests.