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Article History

Received: 7 December 2017

Accepted: 24 October 2018

First Online: 8 November 2018

Ethics approval and participant consent

: The study was approved by the Regional Ethics Research Committee in Östergötland, Sweden (D.nr. 2012/154–31). Patient-informed consent was assumed through the completion and the return of the postal surveys.

: Not applicable.

: The sponsor of the study had no role in study design, data collection, data analysis, data interpretation, writing of the report, or the decision to submit for publication. The authors had full access to all the data in the study and had final responsibility for the decision to submit for publication. The authors declare that they have no competing interests.

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