1. Departments of Pharmacology, Molecular Physiology and Biophysics, and Psychiatry and Behavioral Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
2. Vanderbilt Center for Addiction Research, Vanderbilt University, Nashville, Tennessee 37232, United States
3. Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232, United States