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Gill JR, Ely SF, Zhongxue H. 
“Environmental Gas Displacement : Three Accidental Deaths in the Workplace”. 
Am J of Forensic Medicine and Pathology. 2002;23(1):26-30.
The authors describe three accidental deaths resulting from occupational hazards involving environmental gas alterations. One involved the displacement of oxygen caused by leakage of liquid nitrogen during the installation of a magnetic resonance imaging system. Two involved elevated environmental carbon dioxide concentrations: dry ice sublimation in a walk-in refrigerator in a research laboratory, and activation of a carbon dioxide fire alarm– extinguisher system by a woman locked in a bank vault. The autopsy findings, scene investigations, and certifications of these deaths, as related to the mechanisms of death, are discussed.

Key Words: carbogen
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