Received: 24 August 2017
Accepted: 26 June 2018
First Online: 11 July 2018
Ethics approval and consent to participate
: Ethical approval was received for the study from the Regional Ethical Review Board at Linköping University, Sweden (Dnr 2012/23–31). Participation was voluntary and the informants could interrupt participation at any time. Confidentiality regarding the data collected was assured. Consent for participation was verbal, in accordance with the ethics application.
: Not applicable.
: The authors declare that they have no competing interests.
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