Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (407440_167341)
Received: 24 September 2018
Accepted: 20 December 2018
First Online: 11 January 2019
Ethics approval and consent to participate
: This study was approved by the Swiss Ethics Committee on research involving humans of the Canton de Vaud (project number: 2018–00442). Informed consent will be obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.