1. Associate Professor of Psychology, Department of Psychiatry, The Cambridge Health Alliance; Director, Division on Addictions, Harvard Medical School, Boston, Massachusetts
2. Associate Director for Research and Data Analysis, Division on Addictions, Harvard Medical School, Boston, Massachusetts
3. Instructor in Psychiatry, The Cambridge Health Alliance and the Division on Addictions, Harvard Medical School, Boston, Massachusetts
4. Technical Research Assistant, Division on Addictions, Harvard Medical School, Boston, Massachusetts