Funding for this research was provided by:
Umea University
Article History
Accepted: 1 February 2019
First Online: 12 February 2019
Compliance with ethical standards
: Ethics approval of this study was obtained from the Regional Ethics Committee in Umeå (Dnr 2016/155–31). For this type of study, formal consent from each patient is not required. The authors declare that they have no conflicts of interest in this study.