1. Department of Chemistry University of California Irvine CA USA
2. Now at Cooperative Institute for Research in Environmental Science CU Boulder, NOAA Earth System Research Laboratories Boulder CO USA
3. Department of Chemistry Carnegie Mellon University Pittsburgh PA USA
4. Department of Atmospheric and Oceanic Sciences University of Colorado Boulder CO USA
5. Morgan Community College Fort Morgan CO USA
6. Los Alamos National Laboratory Los Alamos NM USA
7. Department of Chemistry University of Toronto Toronto ON Canada