Research on the medical uses of cannabis was still restricted in the late 1980s and early 1990s, both in the United States and internationally. The National Institute on Drug Abuse (NIDA) was mostly in charge of research at the time, and it was funding studies to learn more about the harmful effects of THC and cannabis. Only one grow house at the University of Mississippi provided medical-grade cannabis for research purposes which was the brain behind the medical legalization of cannabis.