1. Health Communication Research Laboratory, Department of Community Health, School of Public Health, Saint Louis University, 3545 Lafayette Ave., St. Louis, MO 63104; telephone: (314) 977-8132;
2. Washington University, St. Louis, Missouri
3. Missouri Institute of Mental Health, St. Louis
4. National Center of Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, Georgia
5. Saint Louis University, Missouri
6. University of Alabama at Birmingham