1. Department of Cardiothoracic Surgery; Lund University; Lund Sweden
2. Division of Nursing Science; Department of Medical and Health Sciences; Linköping University; Linköping Sweden
3. Department of Cardiothoracic Surgery; Linköping University; Linköping Sweden
4. Department of Cardiothoracic Surgery; Skåne University Hospital Lund; Lund Sweden
5. Department of Public Health and Caring Science; Uppsala University Hospital; Uppsala University; Uppsala Sweden
6. Department of Cardiology; Skåne University Hospital Lund; Lund Sweden