Two Exploratory Double-Blind Crossover Studies of the Treatment of Chronic Noncancer Pain: Efficacy and Safety of Concurrent Dosing of Morphine Plus Oxycodone vs Morphine Alone
Patricia Richards, MD, PhD et al.
Workplace and Nonworkplace Productivity in Chronic Noncancer Pain Patients: The Opioid Utilization Study (OPUS)
Steven Stanos, DO et al.