1. National
Institute for Occupational Safety and Health, National Personal Protective
Technology Laboratory, Evaluation and Testing Branch (CDC/NIOSH/NPPTL/ETB), Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, West Virginia 26505, United States
2. Department
of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
3. National
Institute for Occupational Safety and Health, National Personal Protective
Technology Laboratory, Evaluation and Testing Branch (CDC/NIOSH/NPPTL/ETB), Centers for Disease Control and Prevention, 626 Cochrans Mill Road, Pittsburgh, Pennsylvania 15236, United States
4. C.
Eugene Bennett Department of Chemistry, West Virginia University, 217 Clark Hall, Morgantown, West Virginia 26506, United States