1. Communication, Culture and Technology Program; Georgetown University; Washington DC 20057; USA
2. Department of Communication; University of Dayton; OH 45469; USA
3. Department of Communication; University of Missouri-St. Louis; MO 63121; USA
4. Department of Sociology; University of Maryland; College Park; MD 20742; USA
5. Imaging Science and Information Systems Center; Georgetown University; Washington DC 20057; USA
6. Phoenix Indian Medical Center; Indian Health Service; Phoenix; AZ 85004; USA