1. Department of Environmental and Occupational Health, Drexel University School of Public Health, Philadelphia, PA, USA
2. Health, Human Performance and Recreation, University of Arkansas College of Education and Health Professions, Fayetteville, AR, USA
3. University of Utah, Salt Lake City, UT, USA
4. Dallas Fire-Rescue Department, Dallas, TX, USA
5. Philadelphia Fire Department, Philadelphia, PA, USA
6. San Diego Fire-Rescue Department, San Diego, CA, USA