Funding for this research was provided by:
Universität zu Köln
Article History
Received: 26 July 2021
Revised: 13 October 2021
Accepted: 14 October 2021
First Online: 17 November 2021
Declarations
:
: Ethical approval was waived by the local Ethics Committee of University of Cologne in view of the retrospective nature of the study and all the procedures being performed were part of the routine care.
: Written informed consent was obtained from the parents.
: Not applicable.
: The authors declare no competing interests.