Wesley P. Gilliam, Ph.D., L.P., is a board-certified clinical health psychologist in Mayo Clinic's Department of Psychiatry and Psychology and an assistant professor of psychology at Mayo Clinic College of Medicine and Science. He is the clinical director of Mayo Clinic's Adult Interdisciplinary Pain Rehabilitation Center program. His expertise is in treating chronic pain and his interests include health psychology and behavioral medicine, and the effects of long-term opioid use for chronic...