Stefan Redéen
Division of Surgery, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, University Hospital, Linköping University, Linköping, Sweden
Centre for Health Care Development, Clinicum, County Council of Östergötland, University Hospital, Linköping, Sweden
Roger Larsson
Centre for Health Care Development, Clinicum, County Council of Östergötland, University Hospital, Linköping, Sweden