P Roberts, PhD, Sonoma Technology, Inc., Petaluma, California. M Ward,
DO, Havasu Regional Medical Center Emergency Dept, Lake Havasu City; RL Baron,
MD, Banner Good Samaritan Regional Medical Center Emergency Dept, Phoenix;
W Humble, MPH, M Hadzihasanovic, MD, R Cox, Office of Environmental Health,
Arizona Dept of Health Svcs. L Tapp, MD, J McCammon, MS, R McCleery, MSPH,
Div of Surveillance, Hazard Evaluations, and Field Studies, National Institute
for Occupational Safety and Health, CDC.