1Laboratory of Clinical Studies, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892
2Yale University School of Medicine, New Haven, CT 06520-8042
3Brain Physiology and Metabolism Section, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892
4Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892
5PET Department, National Institutes of Health Clinical Center, Bethesda, MD, 20892
6Molecular Tracer, Bethesda, MD 20814
7Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA 23298