Funding for this research was provided by:
AFA Försäkring (x)
Svenska Forskningsrådet Formas (x)
Anna Ahrenberg’s Foundation
ALF - The Swedish state under the agreement between the Swedish government and the county councils (ALFGBG-721351)
The Swedish Heart and Lung Foundation; (x)
Received: 18 April 2019
Accepted: 12 June 2020
First Online: 1 July 2020
Ethics approval and consent to participate
: The Ethical Committee of Gothenburg approved the study protocol (2013/649) on 25 September 2013. Oral and written informed consent was given by all participants prior to the study.
: The authors declare no potential conflicts of interest.