Funding for this research was provided by:
Chest, Heart and Stroke Association Scotland (Not known. Minor Grant Award)
Received: 3 February 2020
Accepted: 18 May 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: This study was approved by a University of Stirling Ethics and Research Committee and the North of Scotland Research Ethics Committee (REC reference: 13/NS/0152) (IRAS project ID: 133236).
: A written consent was obtained from all participants in the study.
: The authors declare that they have no competing interests.