Brunner, Melanie
Schwarz, Timo
Zeman, Florian
König, Matthias
Grifka, Joachim
Benditz, Achim http://orcid.org/0000-0001-9098-1495
Article History
Received: 14 October 2017
First Online: 7 March 2018
Compliance with ethical standards
:
: The authors declare that they have no competing financial interests.
: The study was approved by the Ethics Commission of the University of Regensburg and carried out in accordance with the approved guidelines. Registration in Deutsche Register Klinischer Studien (DRKS), German Clinical Trials Register DRKS00011788.