Funding for this research was provided by:
The Swedish Government (ALFGBG-522591)
German Federal Ministry of Education and Research (Grant 01GY1603A)
Received: 16 October 2019
Accepted: 3 June 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: Ethical approval was secured for the study from the Regional Ethics Review Board, Gothenburg, Sweden (# 271–14). The datasets employed in the analysis were pseudonymised to ensure the anonymity of patients whose data are included in the study to the research team.
: No applicable.
: FST, JB, and OR declare that they have no competing interests. KB and RL are members of the EuroQoL Group Association.