Wiegering, A.
Liebetrau, D.
Menzel, S.
Bühler, C.
Kellersmann, R.
Dietz, U. A.
Article History
First Online: 6 June 2018
Compliance with ethical guidelines
:
: A. Wiegering, D. Liebetrau, S. Menzel, C. Bühler, R. Kellersmann and U.A. Dietz 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.
: The supplement containing this article is not sponsored by industry.