Tiny Jaarsma1,2, Loreena Hill3, Anna Strömberg1,4. 1. Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden. 2. Julius Center, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands. 3. School of Nursing and Midwifery, Queen's University, Belfast, UK. 4. Department of Cardiology, Linköping University Hospital, Linköping University, Linköping, Sweden.