1. Research and Technology Directorate, U.S. Army, Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010
2. U.S. Environmental Protection Agency, Office of Research and Development, National Homeland Security Research Center, 109 T. W. Alexander Drive, Research Triangle Park, North Carolina 27711
3. U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, 109 T. W. Alexander Drive, Research Triangle Park, North Carolina 27711