1. Division of Occupational & Environmental Medicine; Duke University; Durham North Carolina
2. Department of Exercise & Sport Science; The University of North Carolina at Chapel Hill; Chapel Hill North Carolina
3. Department of Epidemiology; The University of North Carolina at Chapel Hill; Chapel Hill North Carolina
4. Division of Population Health; National Center for Chronic Disease Prevention and Health Promotion; Centers for Disease Control and Prevention; Atlanta Georgia
5. Safety and Health Assessment and Research for Prevention (SHARP) Program; State of Washington Department of Labor & Industries; Olympia Washington