1. Department of MedicineUniversity of Colorado Anschutz Medical Campus Aurora CO USA
2. Cardiovascular Institute at Allegheny Health Network Pittsburgh PA USA
3. School of Sport and Health SciencesCardiff Metropolitan University Cardiff CF5 2YB UK
4. Department of MedicineDivision of CardiologyColumbia University Irving Medical Center New York City NY USA
5. Department of Medicine‐CardiologyUniversity of Colorado Anschutz Medical Campus Aurora CO USA