Zajonz, Dirk
Behrens, Julia
Brand, Alexander Giselher
Höch, Andreas
Fakler, Johannes K. M.
Roth, Andreas
Josten, Christoph
Ghanem, Mohamed
Article History
First Online: 11 December 2018
Compliance with ethical guidelines
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: D. Zajonz, J. Behrens, A.G. Brand, A. Höch, J.K. M. Fakler, A. Roth, C. Josten and M. Ghanem declare that they have no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors. All procedures reported in this article were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All participants gave written, informed consent within the scope of the treatment contract. The study was approved by the university ethics committee (number: 171-16/ek25042016).