Siebels, Henrike
Sohns, Christian
Nürnberg, Jan-Hendrik
Siebels, Jürgen
Langes, Klaus
Hebe, Joachim
Article History
Received: 30 January 2018
Accepted: 2 April 2018
First Online: 15 May 2018
Compliance with ethical standards
: Prior to the procedure, written informed consent was obtained from the patients’ parents or guardian in all cases. The study has been approved by the institutional review board, and all patient information was anonymized.
: The authors declare that they have no conflicts of interest.