1. Department of Pharmacology and Neuroscience and Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430
2. Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115.
3. Section on Synaptic Pharmacology, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland 20892
4. Department of Pharmacology and Neuroscience, University of North Texas Health Sciences Center, Fort Worth, Texas 76107