Ihle, C.
Maurer, J.
Ziegler, P.
Stöckle, U.
Ateschrang, A.
Ahrend, M.-D. http://orcid.org/0000-0001-7044-4182
Schröter, S.
Article History
Received: 10 October 2018
Accepted: 2 January 2019
First Online: 22 January 2019
Ethics approval and consent to participate
: The study protocol was approved by the local ethics committee (195/2014BO2). Written consent of the ethics committee of the medical university of Tübingen is available.
: “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.