The Alzheimer's Disease Cooperative Study (ADCS) is a cooperative agreement between the NIA and the University of California, San Diego, to advance research in the development of drugs to treat AD. The ADCS is a consortium of medical research centers and clinics working to develop clinical trails of medicines to treat behavioral symptoms of AD, improve cognition, slow the rate of decline of AD, delay the onset of AD, or prevent the disease altogether. The ADCS also develops new and more reliable ways to evaluate patients enrolled in clinical trials.