http://www.druglibrary.org/olsen/RASTAFARI/mazur2.html
marijuana in high doses for sixteen hours a day for up to fifty years,
suffer no apparent psychological or physical harm; tolerance appears to
have developed with no acute or chronic side effects); Research Report by
Kenneth C. Fischer, M.D. of Florida (1980) (after doing a "complete
intensive neurological examination on 31 members" of the EZCC, the "most
impressive thing ... is the true paucity of neurological abnormalities I
was able to discern"); American Association for the Advancement of
Science, Cognition and Long-Term Use of Gania, 213 SCIENCE 465-66 (1981)
(prolonged and heavy use of ganja have not resulted in any systematic
decrements in mental abilities suggestive of impairment of brain or
cerebral function; cognition I.Q. scores were high, and individuals
appear to be healthy and highly functional); Neuropsychological
Evaluation by Jeffrey Schaeffer, Ph.D. of California (1981) (despite
measurable amounts of cannabinoid metabolites in his body and a history
of very long-term use of cannabis, Carl Eric Olsen demonstrated no
impairment of his cognitive, cerebral, intellectual, or new learning
abilities, nor was there any suggestion of damage to the central nervous
system or long and short-term memory ability; moreover, his ability to
adapt to change remains at a very high level). Amicus Memorandum Before
DEA, July 1988, App. 7, 8, 9.