van Valkengoed, Anne M. http://orcid.org/0000-0002-2319-4341
Steg, Linda http://orcid.org/0000-0002-8375-9607
Article History
Received: 9 March 2018
Accepted: 19 November 2018
First Online: 14 January 2019
Competing interests
: The authors declare no competing interests.