1. Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, USA
2. National Vehicle and Fuels Emissions Laboratory, Office of Transportation and Air Quality, U. S. Environmental Protection Agency, Ann Arbor, Michigan, USA
3. Office of Research and Development, U. S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
4. Formerly United Technologies Research Center, East Hartford, Connecticut, USA (retired)
5. Center for Excellence for Aerospace Particulate Emissions Reduction Research, Missouri University of Science and Technology, Rolla, Missouri, USA
6. Aerospace Testing Alliance, Arnold Engineering Development Complex, Arnold Air Force Base, Tennessee, USA
7. AVL-North America, Plymouth, Michigan, USA
8. ARCADIS-U.S., Durham, North Carolina, USA
9. National Research Council-Canada, Ottawa, Canada
10. Boston College, Chestnut Hill, Massachusetts, USA
11. TSI, Inc, Shoreview, Minnesota, USA
12. Aerodyne Research, Inc, Billerica, Massachusetts, USA
13. Artium Technologies, Sunnyvale, California, USA