Affiliation: | 1. Department of Heart Disease, Haukeland University Hospital, , Bergen, Norway;2. School of Health Sciences, J?nk?ping University, , Sweden;3. Institute of Nursing, Bergen University College, , Norway;4. Institute of Medicine, University of Bergen, , Norway;5. Section of Cardiothoracic Surgery, Department of Heart Disease, Haukeland University Hospital, , Bergen, Norway;6. Institute of Surgery, University of Bergen, , Norway |