Article History
Received: 10 July 2019
Accepted: 15 July 2019
First Online: 19 July 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee of the University of Rostock (Reference No. A 2015–0092). All patients or legal guardians provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.