Funding for this research was provided by:
Suva - Swiss National Accident Insurance Fund
Received: 26 July 2019
Revised: 14 February 2020
Accepted: 14 February 2020
First Online: 26 February 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: We certify that all applicable institutional and governmental regulations concerning the ethical treatment of human volunteers were followed throughout the study. The study obtained ethical approval from the regional committee of north-western and central Switzerland (Ethikkommission Nordwest- und Zentralschweiz, reference number EKNZ 2015-311).