1. Drug Design and Synthesis Section, Chemical Biology Research Branch, National Institute on Drug Abuse and the National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health; Department of Health and Human Services; Bethesda MD USA
2. Imaging Probe Development Center, National Heart, Lung and Blood Institute; National Institutes of Health; Bethesda MD USA
3. Laboratory of Membrane Biochemistry and Biophysics; National Institute on Alcohol Abuse and Alcoholism; Bethesda MD USA
4. Center for Molecular Modeling, Division of Computational Bioscience, Center for Information Technology; National Institutes of Health; Bethesda MD USA