1. Director and research assistant, respectively, Center for Human Toxicology, University of Utah, Salt Lake City, US.
2. Chief toxicologist, Office of the Chief Medical Examiner, Baltimore, Md., US.
3. Chief toxicologist, Southwest Institute of Forensic Sciences, Dallas, Tex., US.
4. Toxicologist, Wayne County Medical Examiner's Office, Detroit, Mich., US.
5. Chief toxicologist, San Diego County Coroner's Office, San Diego, Calif., US.