1. Research Assistant, Karolinska Institute, CLINTEC, Division of Anesthesiology, Karolinska University Hospital, Stockholm, Sweden.
2. Assistant Professor, Center for Medical Technology Assessment, Linköping University, Linköping, Sweden.
3. Assistant Professor, Department of Health Sciences, Lund University, Lund, Sweden.
4. Professor, Department of Orthopedics, Lund University Hospital, Lund, Sweden.
5. Professor, Center for Medical Technology Assessment, Linköping University.
6. Professor, Karolinska Institute, CLINTEC, Division of Anesthesiology, Karolinska University Hospital.