Information collected will include such items as psychiatric diagnoses, presence or absence of brain, liver or other organ damage, history of the amount of past alcohol consumption, other substance use and family history of alcoholism. This information will allow investigators to determine for which, if any, NIAAA research studies a subject is eligible. In order to avoid requiring intoxicated subjects to consent for procedures such as HIV testing, psychiatric interviews, and Magnetic Resonance Imaging (MRI) of the brain we will obtain consent from all alcoholic subjects in two phases, using two separate consent forms. The first consent form will express the subject's desire to be admitted to the NIAAA inpatient unit for the purpose of treatment for alcoholism and will authorize only medical evaluation and treatment for alcoholism and associated problems. After an alcoholic subject has been admitted to the inpatient unit and is judged to be no longer intoxicated or suffering from acute alcohol withdrawal he or she will be presented with the second consent which will describe the evaluation for participation in other NIAAA research studies. Non-alcoholic, healthy controls will sign only one consent form describing the data to be collected and evaluation for participation in other NIAAA research studies.