Funding for this research was provided by:
National Heart, Lung, and Blood Institute (R01HL116381)
ALF, Region Skåne
Received: 3 July 2019
Accepted: 18 October 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: The study protocol has been priorly approved by the Ethics committee at Lund University (approval no. 174–95 and 2011/494). Written informed consent was obtained from each participant included in the study. The study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.