1. Institute for Health Policy Studies and Department of Anthropology, History and Social Medicine, University of California at San Francisco, San Francisco, California, USA
2. Department of Epidemiology, Public Health Institute, University of California at Berkeley and Alcohol Research Group, Emeryville, California, USA
3. Alcohol Research Group, Public Health Institute, Emeryville, California, USA
4. Public Research Institute and Department of Sociology, San Francisco State University, San Francisco, California, USA