Schizophrenia research in the Intramural Research Program, National Institute of Mental Health: editor's introduction.

One of the major reasons for the existence of National Institute of Mental Health's Intramural Research Program is the study of schizophrenia. The program provides relatively stable funding for the long-term examination of the basic and clinical sciences as they relate to this major public-health problem. This article and those that follow review some of the past and current contributions to our understanding of schizophrenia that have emanated from the Intramural Research Program.