Funding for this research was provided by:
The Swedish Rheumatism Association (NA)
the Foundation for Assistance to Disabled People in Skåne, Sweden (NA)
Received: 3 April 2020
Accepted: 27 July 2020
First Online: 8 October 2020
Ethics approval and consent to participate
: The study was approved by the ethical review board in Lund (entry nos. 2009/670 and 2016/896). The study adhered to the tenets of the Declaration of Helsinki and all patients gave their written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.