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Article History

Received: 20 February 2018

Accepted: 13 November 2018

First Online: 24 November 2018

Ethics approval and consent to participate

: The study has been approved by the Research Ethics Committee at Lund University.No 2015/169.The data from the Blekinge County Council health care register were used after special permission. The individual consent to participate was waived by the ethics committee in agreement with Swedish law and national guidelines regarding large register studies. Thus, presumed consent to participate was used. Detailed information about the study was published in two major local newspapers with contact information to the first author. The participants could have their data excluded from the study without giving a reason for this by contacting the first author through e-mail or telephone.

: Obtained by presumed consent in accordance with decision of the Research Ethics Committee at Lund University No 2015/169. No data were published at an individual level.

: All the authors declare that they have no competing interests.

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