Gutknecht, Norbert
Al Hassan, Nour http://orcid.org/0000-0001-6362-9891
Martins, Miguel R.
Conrads, Georg
Franzen, Rene
Article History
Received: 4 August 2018
Accepted: 22 October 2018
First Online: 16 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.