1. Professor of Psychiatry, Department of Psychiatry & Behavioral Neuroscience, University of Chicago, Chicago, Illinois
2. Research Coordinator, Impulse Control Disorders Clinic, Department of Psychiatry, University of Minnesota, Minneapolis, Minnesota
3. Visiting Researcher, Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Researcher, Department of Psychiatry & Behavioral Neuroscience, University of Chicago, Chicago, Illinois