Funding for this research was provided by:
European Community’s Seventh Framework Programme (241724)
Received: 3 June 2019
Accepted: 1 July 2020
First Online: 16 July 2020
Ethics approval and consent to participate
: The project received ethical approval from the following institutions in the participating countries: The Norwegian Social Science Data Services, ref. 26636 (name today: Norwegian Centre for Research Data) and exempted from ethical approval from Regional Ethical Committee according to the Norwegian Act on Medical Health Research (2008); in Portugal the study was conducted in compliance with the legislation that regulates interview or questionnaire-based data collection (Lei n° 10/2000) and personal data protection (Lei n°67/98), which requires no specific ethical approval for these studies; in The Netherlands the study complies with the Medical Research Involving Human Subjects Act and ethical approval was not required; in Sweden, the Regional Ethical Committee, Linköping, ref. 2011/164–31; and in England, the NRES Committee South East Coast, Surrey, ref. 11/ L010348. In all countries, a written consent form for participants was signed by each interviewee with permission to use the de-identified data by the researchers.
: Not applicable.
: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.