Dierkes, Georg
Lauschke, Tim
Becher, Susanne
Schumacher, Heike
Földi, Corinna
Ternes, Thomas
Funding for this research was provided by:
Bundesministerium für Verkehr und Digitale Infrastruktur
Bundesministerium für Bildung und Forschung
Article History
Received: 14 June 2019
Revised: 15 July 2019
Accepted: 1 August 2019
First Online: 30 August 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.