"Beginning in 2007 and prior to initiating this study, GW conducted substantial pre-clinical oncologic research on several cannabinoids in various forms of cancer including brain, lung, breast, pancreatic, melanoma, ovarian, gastric, renal, prostate and bladder. These studies have resulted in approximately 15 publications and show the multi-modal effects of cannabinoids on a number of the key pathways associated with tumor growth and progression."