Gross-Hemmi, Mirja H. http://orcid.org/0000-0002-2231-6538
Fekete, Christine http://orcid.org/0000-0002-3753-3017
Post, Marcel W. M. http://orcid.org/0000-0002-2205-9404
Scheel-Sailer, Anke http://orcid.org/0000-0003-3820-6664
Schwegler, Urban http://orcid.org/0000-0002-2844-0812
Brinkhof, Martin W. G. http://orcid.org/0000-0002-9319-665X
Article History
Received: 28 February 2020
Revised: 10 September 2020
Accepted: 15 September 2020
First Online: 14 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Ethical approval for Survey 2012 was approved by the principal ethics committee on research involving humans of the Canton of Lucerne (KEK Luzern, internal application 11042, approved June 28, 2011) and subsequently endorsed by the additional involved cantonal ethics committees of Cantons Basel-Stadt (EK Basel, internal application 306/11, approved September 6, 2011) and Valais (CCVEM Sion, internal application CCVEM042/11, approved December 6, 2011). Ethical approval for Survey 2017 was granted by the leading ethical institution Ethikkommision Nordwest-und Zentralschweiz (EKNZ, Project-ID: 11042 PB_2016-02608, approved December 2016). We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during the course of this research.