Funding for this research was provided by:
Stiftelsen Samariten (2015-0000)
Västerbotten Läns Landsting (VLL-645531)
Text and Data Mining valid from 2019-03-27
Received: 14 January 2019
Accepted: 13 March 2019
First Online: 27 March 2019
Compliance with ethical standards
: All authors declare that they have no conflicts of interest to disclose.
: All procedures in the study involving human participants were in accordance with the Ethical Standards of the 1964 Helsinki Declaration and its later amendments or comparable standards. The study was approved by the Regional Ethical Review Board in Umea.
: Informed consent was given by the participants or by their legal guardians.