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Article History

Received: 15 March 2019

Accepted: 22 October 2019

First Online: 8 November 2019

Ethics approval and consent to participate

: Ethical approval for the NPART project was granted by the Ethical Review Board (EPN) in Linköping, Sweden (registration number 2016/47431). All study procedures are in accordance with the national regulations specified by the responsible committee and with the relevant EU standards (see e.g. EU Directive 95/46/EC). All persons involved will be provided with the presentation letter explaining the processes of the data collection and analysis, together with the questionnaire. In the presentation letter, it will be made clear that answering and returning the questionnaire corresponds to giving informed consent. Participants will be recruited on a voluntary basis according to international declarations (the Declaration of Helsinki, as revised in 2013). Further information to the participants will be provided in an appropriate manner by qualified personnel to ensure that they understand the issues involved in the research project.

: Not applicable.

: The authors declare that they have no competing interests.