1. Department of Pathology; University Hospital - CHU Sart Tilman; Domaine Universitaire du Sart Tilman - B.35; Liège B-4000 Belgium
2. Department of Forensic Medicine; Medico-legal Institute of the University of Liège; Rue Dos-Fanchon 37; B-4020 Liège Belgium
3. Department of Pathology; University of Michigan; 300 N. Ingalls, NI2D22, SPC 5452 Ann Arbor Michigan 48109 USA
4. Medico-legal Toxicology Laboratory; University Hospital - CHU Sart Tilman; Domaine Universitaire du Sart-Tilman - B.35; Liège B-4000 Belgium