Fritzmann, Johannes http://orcid.org/0000-0003-1869-3960
Contin, Pietro
Reissfelder, Christoph
Büchler, Markus W.
Weitz, Jürgen
Rahbari, Nuh N.
Ulrich, Alexis B.
Article History
Received: 4 September 2017
Accepted: 25 February 2018
First Online: 9 March 2018
Compliance with ethical standards
: All procedures were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.