1. Joseph E. Carpenter, Arthur S. Chang, and Royal K. Law are with Health Studies Section, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA. Joseph E. Carpenter is also with Department of Emergency Medicine, Emory University School of Medicine, Atlanta. Alvin C. Bronstein is with Emergency Medical Services and Injury Prevention System Branch, Hawaii State Department of Health, Honolulu. Richard G. Thomas is with American Association of Poison Control Centers,...