1. Department of Health Promotion and Behavior, College of Public Health, University of Georgia, Athens, Georgia
2. Department of Applied Health Science, School of Public Health, Indiana University, Bloomington, Indiana
3. Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, Georgia
4. Department of Health Promotion and Physical Education, Kennesaw State University, Marietta, Georgia
5. Division of Surveillance, Hazard Evaluations and Field Studies, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio