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Article History

Received: 7 February 2018

Accepted: 24 October 2018

First Online: 8 November 2018

Ethics approval and consent to participate

: In Sweden and Norway ethical approval was not required for this kind of study, according to the Swedish Ethical Review Act (Lag 2003:460) and the Norwegian Health Research Act of 2008. Data collection was approved by the Data Protection Officials for Research in Haukeland University Hospital (2015/14195) and at Telemark Hospital (45845) in Norway. In Finland, data collection was approved by the hospital administration at Satakunnan keskussairaala (12/2015), Pori In Iceland permission was granted by the Ethical Committee of Administrative Research at Landspitali University Hospital (01/2016) and the Icelandic Data Protection Authority was informed about details on the data collection through a formal report process (S7613/2016). In accordance with national regulations, Norwegian participants gave their written consent to participate. Consent for participation was not required in any of the other countries.

: Not applicable.

: The authors declare that they have no competing interests.

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