Funding for this research was provided by:
Commity for patient safety/Research and Development, Västernorrland County Council. (143)
Received: 20 December 2017
Accepted: 14 May 2018
First Online: 5 June 2018
Ethics approval and consent to participate
: The study was approved by the regional committee for medical and health research ethics at Umeå (Ref. 2014–14-31 M). Each participant was given a verbal and written information of the study. All participation was voluntarily and a written consent to participate was obtained prior to inclusion.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.