Roger Chou is a Professor in the Department of Medical Informatics & Clinical Epidemiology and the Department of Medicine at Oregon Health & Science University (OHSU) School of Medicine and Director of the Pacific Northwest Evidence-based Practice Center. His clinical background is general internal medicine. He has authored over 300 peer-reviewed articles, including numerous systematic reviews, and led or participated in clinical guideline development efforts in chronic pain and opioids, low back pain, addiction, and other topics, and is among the top 2% cited scientists in the world. His reviews have been used by the American College of Physicians, the Centers for Disease Control and Prevention, the US Preventive Services Task Force, the American Pain Society, the American Urological Association, the World Health Organization, and others to develop clinical practice guidelines. Dr. Chou serves as a methodologist for several World Health Organization guideline development groups, served as Coordinating Editor of the Cochrane Back and Neck and Senior Editor of Cochrane Musculoskeletal, and serves on the Board of Scientific Counselors of the CDC’s National Centers for Injury Prevention and Control.