Ronald K. Siegel, Ph.D. (1943-2019) was a psychopharmacologist on the faculty of the Department of Psychiatry and Biobehavioral Sciences at the UCLA School of Medicine and was a leading authority on the social and psychological effects of drug use. The author of Fire in the Brain and Whispers: The Voices of Paranoia, his research has also appeared in Psychology Today, Scientific American, and Omni as well as the Journal of the American Medical Association and the American Journal of Psychiatry.
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