,
Weiss, Bjoern http://orcid.org/0000-0003-3139-595X
Article History
Received: 27 December 2018
Accepted: 18 March 2019
First Online: 4 April 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest regarding the content of the manuscript.
: An approval by an ethics committee was not applicable.