Brüggemann, Thomas
Dahlke, Daniel
Chebbo, Amin
Neumann, Ilka
Article History
Received: 15 June 2015
Accepted: 2 August 2016
First Online: 30 August 2016
Compliance with ethical guidelines
:
: T. Brüggemann, D. Dahlke, A. Chebbo and I. Neumann state that they have no competing interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.