Oldhafer, F. http://orcid.org/0000-0001-9074-1985
Ringe, K. I.
Timrott, K.
Kleine, M.
Beetz, O.
Ramackers, W.
Cammann, S.
Klempnauer, J.
Vondran, F. W. R.
Bektas, H.
Article History
Received: 13 August 2017
Accepted: 1 February 2018
First Online: 22 February 2018
Compliance with ethical standards
: All procedures performed in studies involving human participants 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. This article does not contain any studies with animals performed by any of the authors. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.
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