Dr. Harris and Dr. Larson are affiliated with the Office of Applied Studies at the Substance Abuse and Mental Health Services Administration, 1 Choke Cherry Lane, Rockville, Maryland 20857 (e-mail,
kharris@samhsa.gov). Dr. Edlund is with the Center for Mental Healthcare and Outcomes Research at the Central Arkansas Veterans Healthcare System. Harold Alan Pincus, M.D., and Terri L. Tanielian, M.A., are editors of this column.