Roll, Christina
Tittel, Sandra
Schäfer, Malte
Burkhardt, Janosch
Kinner, Bernd
Article History
Received: 1 July 2018
First Online: 5 December 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Approval by the internal review board (IRB) was obtained.
: Informed consent was obtained from all individual participants included in the study.