1Norwegian Institute of Public Health, Division of Forensic Toxicology and Drug Abuse, P.O. Box 4404 Nydalen, NO-0403 Oslo, Norway
2Department of Forensic Medicine, Section of Forensic Chemistry, Faculty of Health Sciences, University of Copenhagen, Denmark
3Hjelt Institute, Department of Forensic Medicine, PO Box 40 (Kytösuontie 11), FI-00014 University of Helsinki, Finland
4Department of Pharmacology and Toxicology, University of Iceland, Iceland
5Department of Forensic Genetics and Forensic Toxicology, National Board of Forensic Medicine, Artillerigatan 12, 58758 Linköping, Sweden