Mazur, F.
Swoboda, B.
Carl, H. D.
Lutter, C.
Engelhardt, M.
Hoppe, M. W.
Hotfiel, T. http://orcid.org/0000-0001-7246-0020
Grim, C.
Article History
Received: 18 October 2018
Accepted: 17 January 2019
First Online: 7 February 2019
Ethics approval and consent to participate
: The local Ethics Committee approved the study with no requirements (Ref. No. 57_17 B; University of Erlangen-Nuremberg). All patients were informed regarding the purpose, benefits and risks of the investigation prior to signing an institutionally approved informed consent form to participate in the study.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.