1. Department
of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, South Dakota 57007, United States
2. Beckman Laser
Institute and Medical Clinic, University of California, Irvine, California 92612, United States
3. Division
of Pulmonary
and Critical Care Medicine, Department of Medicine, University of California, Irvine, California 92868, United States
4. Analytical Toxicology
Division, United States Army Medical Research Institute of Chemical Defense, 3100 Ricketts Point Road, Aberdeen Proving
Ground, Maryland 21010, United States