1. Professor and chairman, Department of Pathology, and director, Toxicology Laboratory, University of California, San Diego Medical Center, San Diego, CA, US.
2. Division of Laboratory Medicine University of California, San Diego Medical Center, H-720 225 Dickinson St. San Diego, CA 92103, US.
3. Chief forensic toxicologist, Office of the Coroner, County of San Diego, San Diego, CA, US.