1. Department of Mental Health, Bloomberg School of Public Health, Johns Hopkins University, 624 N Broadway, Room 798, Baltimore, MD, USA
2. Department of Neuropsychology, Kennedy Krieger Institute, Johns Hopkins University, Baltimore, MD, USA
3. Center for Economic and Social Research, University of Southern California, Los Angeles, CA, USA
4. Centre for Alcohol Policy Research, La Trobe University, Bundoora, VIC, Australia
5. Joint Program in Survey Methodology, University of Maryland, College Park, College Park, MD, USA
6. School of Social Sciences, University of Mannheim, Mannheim, Germany
7. Statistical Methods Group, Institute for Employment Research, Nuremberg, Germany
8. Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
9. School of Nursing, Columbia University, New York, NY, USA