Funding for this research was provided by:
Stein Erik Hagens Foundation for Clinical Heart Research (-)
Helse Sør-Øst RHF (-)
Received: 12 November 2018
Accepted: 24 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: The study was approved by the Norwegian Regional Committee for Medical Research Ethics, South-East Norway (number 298-05095). All patients provided written, informed consent for study participation.
: Not applicable.
: The authors declare that they have no competing interests.