Van Hoef, S. http://orcid.org/0000-0002-1932-8175
Tollens, T.
Article History
Received: 10 July 2019
Accepted: 7 August 2019
First Online: 27 August 2019
Compliance with ethical standards
:
: The authors have no conflicts of interest with regard to this paper.
: This study did not require approval from the local ethical committee.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Formal consent was not required for this study.