Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (310030B_160363/1)
European Research Council (STONECULT)
Article History
Received: 17 March 2018
Revised: 21 August 2018
Accepted: 12 November 2018
First Online: 18 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.