Altmann, Stefan http://orcid.org/0000-0001-5009-9545
Kuberczyk, Maximilian
Ringhof, Steffen
Neumann, Rainer
Woll, Alexander
Article History
Received: 20 December 2017
Accepted: 22 March 2018
First Online: 23 April 2018
Compliance with ethical guidelines
:
: S. Altmann, M. Kuberczyk, S. Ringhof. Neumann and A. Woll declare that they have no competing interests.
: The study was approved by the institutional review board and was conducted in accordance with the Declaration of Helsinki. All subjects gave their written informed consent prior to participation.