1. Department of Chemistry and Biochemistry and Center for Advanced Research in Forensic Science Florida International University 11200 SW 8th St. Miami Florida 33199 USA
2. Bundeskriminalamt, KT 42—Inorganic Materials and Microtraces, Coatings Wiesbaden 65173 Germany
3. AUDIAS Research Group, Department of Electronic and Communication Technology Universidad Autonoma de Madrid Madrid Spain
4. Division of Chemical and Physical Traces, Microtraces and Materials Group Netherlands Forensic Institute Laan van Ypenburg 6 The Hague 2497GB The Netherlands
5. Department of Forensic and Investigative Science West Virginia University 1600 University Avenue Morgantown West Virginia 26506 USA
6. Michigan State Police, Grand Rapids Forensic Laboratory 720 Fuller Ave NE Grand Rapids Michigan 49503 USA
7. Sacramento County DA's Office, Laboratory of Forensic Services 4800 Broadway, Suite 200 Sacramento California 95820 USA
8. Elba Elemental Consulting Corning New York 14830 USA
9. Department of Mathematics and Statistics South Dakota State University Brookings South Dakota 57007 USA