- Visit Marijuana Policy Project, a lobbying organization which has assisted in putting pressure on NIDA on behalf of research
- Website of Dr. Lester Grinspoon and James. B. Bakalar of Harvard Medical School, authors of Marihuana: The Forbidden Medicine
- For information about California State-funded medical marijuana research projects, coordinated by the Center for Medicinal Cannabis Research (CMCR), look here.
- For information about GW Pharmaceutical Company research into the medical uses of marijuana extracts, see their website
