These are links to specific reports and articles on the medical use of cannabis.
Current Status and Future of Cannabis Research - by Ethan B. Russo, MD; Alice P. Mead, JD, LLM; and Dustin Sulak, DO. - This well written article summarizes the current legal status of cannabis, explaining the regulatory scheme behind federal policy with respect to cannabis.
National Conference of State Legislatures - An excellent resource for current information on legislation pertaining to medical cannabis.
Understanding Medical Cannabis - Prepared by the California collective Elemental Wellness, this online, 24-page booklet is an excellent resource publication for patient and professional alike.