1. Division of Gastroenterology and Hepatology, University Hospital, SE-581 85 Linköping SE.
2. Department of Emergency Medicine, University Hospital, Linköping, SE.
3. Department of Clinical Pharmacology, University Hospital, Linköping, SE.
4. Division of Upper Abdominal Surgery, University Hospital, Linköping, SE.
5. National Laboratory of Forensic Science, Linköping, SE.
6. Department of Forensic Toxicology, National Laboratory of Forensic Medicine, University Hospital, Linköping, SE.