1. Department of Forensic Medicine; Medico-legal Institute of the University of Liège; Rue Dos-Fanchon 37, B-4020 Liège Belgium
2. Department of Pathology; University of Michigan; 300 N. Ingalls, NI2D22 Ann Arbor Michigan 48109 USA
3. Medico-legal Toxicology Laboratory; University Hospital - C.H.U. Sart Tilman; Domaine Universitaire du Sart Tilman - B.35 B-4000 Liège Belgium