1. University of Exeter Medical School; Institute of Health Research; Veysey Building, Salmon Pool Lane Exeter UK EX2 4SG
2. Bispebjerg Hospital, University of Copenhagen; Dept. of Cardiology, Dept. of Physical Therapy and IOC Sports Institute Copenhagen; Bispebjerg Bakke 23 Copenhagen Denmark
3. Wythenshawe Hospital, University Hospital of South Manchester NHS Foundation Trust; Cardiac Rehabilitation; Manchester UK
4. University College London; Farr Institute of Health Informatics Research; 222 Euston Road London UK NW1 2DA