1. U.S. Food and Drug Administration Forensic Chemistry Center, Cincinnati, OH 45237
2. Analytica Laboratories Ltd, Hamilton, New Zealand
3. University of Waterloo, Environmental Isotope Laboratory, Waterloo, ON, Canada
4. Smithsonian Museum Conservation Institute, Suitland, MD 20746
5. National Research Council, Ottawa, ON, Canada
6. Canadian Food Inspection Agency, Ottawa, ON, Canada
7. Canada Border Services Agency, Ottawa, ON, Canada
8. USGS/Reston Stable Isotope Laboratory, Reston, VA 20192