Kunzmann, Patrick http://orcid.org/0000-0002-9756-0914
Hamacher, Kay
Article History
Received: 6 April 2018
Accepted: 10 September 2018
First Online: 1 October 2018
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.