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Article History

Received: 6 November 2017

Accepted: 17 September 2018

First Online: 10 October 2018

Ethics approval and consent to participate

: The Danish Data Protection Agency gave permission to collect and hold survey data and obtain registry data (J.no.: 2012-58-006 / Case no.: 1-16-02-94-16). Further the study achieved clearance at The Danish Patient Safety Authorities (J.no.: 3-313-1729-1) and the Central Denmark Region Committees on Health Research Ethics (143/2016). The trial is registered in ClinicalTrials.gov (NCT03253888) (see Additional file ).

: Not applicable.

: The authors declare that they have no competing interests.

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