GWCA0962

A Double-Blind, Randomized, Placebo-Controlled, Parallel Group Study of Sativex oromucosal spray (Sativex, Nabiximols) as Adjunctive Therapy in Relieving Uncontrolled Persistent Chronic Pain in Patients with Advanced Cancer, Who Experience Inadequate Analgesia During Optimized Chronic Opioid Therapy.