http://thinkprogress.org/health/2015/06/23/3672972/obama-admin-loosens-mj-research-restrictions/
"In April, NIDA acknowledged the findings of a St. George’s University of London study that found a reduction in tumors in mice exposed to the combination of cannabinoids, saying that future studies may lead to new medications. Domestically, science has challenged what some consider archaic reasoning for maintaining marijuana’s Schedule I status. An Emory University study conducted at the beginning of the year found that marijuana didn’t significantly affect lung function, supporting the findings of research conducted years earlier."
