1. Professor of pathology, University of Southern California School of Medicine, Los Angeles, Calif. 90033, US.
2. Chief toxicologist, Southwestern Institute of Forensic Sciences, Dallas, Tex., US.
3. Chief toxicologist, Institute of Forensic Sciences, Oakland, Calif., US.
4. Chief forensic toxicologist, Office of the Sheriff-Coroner, Santa Ana, Calif., US.
5. Chief toxicologist, Office of the Coroner, San Diego, Calif., US.