Very long-term users of marijuana in the United States: a pilot study.

@article{Gruber1997VeryLU,
  title={Very long-term users of marijuana in the United States: a pilot study.},
  author={Amanda J Gruber and Harrison Graham Pope and Paulina Oliva},
  journal={Substance use & misuse},
  year={1997},
  volume={32 3},
  pages={249-64}
}
The authors recruited a sample of 37 Americans, aged 30-74, who had smoked marijuana on at least 5,000 separate occasions. These subjects were found to span a wide range of ethnic groups, educational backgrounds, occupations, and annual income; they did not display any obvious features which distinguished them from the population as a whole. They typically began smoking in the 1960s or early 1970s, and then continued to smoke heavily into middle adulthood because they felt that marijuana… CONTINUE READING