Funding for this research was provided by:
Vetenskapsrådet (2014-7196)
Västerbotten Läns Landsting
Norrbottens Läns Landsting
Umea University
Article History
Received: 8 October 2021
Accepted: 25 November 2021
First Online: 14 December 2021
Declarations
:
: The authors declare no conflict of interest regarding the publication of this paper. Any underlying research material can be accessed by contacting the corresponding author.
: This study was approved by the Regional Board of Ethics at the Karolinska Institute, Stockholm, (reference number: 2009/227-31/3 and 2012/1775-32).
: All procedures performed in the study were in accordance with the ethical standards of the Institutional Research Committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All experiments in the study complied with current law in Sweden. No animal study was performed by any of the authors.
: All patients included provided a signed written consent for participation and publication after receiving verbal and printed information.