1. University of California, Los Angeles, Fielding School of Public Health, Los Angeles, California
2. Alcohol Research Group, Public Health Institute, Emeryville, California
3. School of Public Health, University of California, Berkeley, Berkeley, California
4. NORC at the University of Chicago, Bethesda, Maryland
5. Pacific Institute for Research and Evaluation, Calverton, Maryland
6. Safe Transportation Research & Education Center, University of California, Berkeley, Berkeley, California