Rick Strassman, M.D., is clinical associate professor of psychiatry at the University of New Mexico School of Medicine and the author of DMT: The Spirit Molecule. Slawek Wojtowicz, M.D., is a medical oncologist working in the pharmaceutical industry in Edison, New Jersey, a science-fiction illustrator, and the author of Daydreaming. Luis Eduardo Luna, Ph.D., is coauthor (with Pablo Amaringo) of Ayahuasca Visions and director of Wasiwas--Research Centre for the Study of Psychointegrator Plants, Visionary Art and Consciousness in Florianópolis, Brazil. Ede Frecska, M.D., is chief of psychiatry at the National Institute of Psychiatry and Neurology in Budapest, Hungary, and a contributing author to Psychedelic Medicine.