Received: 6 April 2020
Accepted: 2 July 2020
First Online: 17 July 2020
Ethics approval and consent to participate
: The positive vote of the ethics committee (ethic committee medical faculty of the University of Tübingen) with the number 26/210BO1 is available.
: Written informed consent for publication was obtained from the parents (Fig. InternalRef removed).
: The authors declare that they have no competing interests.