Kobler, Ulrike Gabriele http://orcid.org/0000-0003-4661-3876
Wüest, Alfred http://orcid.org/0000-0001-7984-0368
Schmid, Martin http://orcid.org/0000-0001-8699-5691
Funding for this research was provided by:
Swiss Federal Railways
Article History
Received: 2 August 2018
Accepted: 12 November 2018
First Online: 14 December 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.