Some 36 states now permit marijuana to be used medically, and 17 allow recreational use. Yet researchers who wish to study the drug’s health effects have been limited since 1968 to a single legal supplier of the drug, the University of Mississippi. That looks set to change soon, as the US Drug Enforcement Administration (DEA) announced Friday (May 14) that it has sent memorandums of agreement (MOAs) to hopeful growers “outlining the means by which the applicant and DEA will work together to facilitate the production, storage, packaging, and distribution of marijuana under the new regulati...