1. Department of Chemistry University of California Berkeley CA USA
2. Now at California Department of Public Health Richmond CA USA
3. Department of Atmospheric Sciences University of Washington Seattle WA USA
4. Chemical Sciences Division, Earth System Research Laboratory, NOAA Boulder CO USA
5. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
6. Department of Chemistry University of Colorado Boulder Boulder CO USA
7. Now at Department of Physics and Atmospheric Science Dalhousie University Halifax Nova Scotia Canada
8. Now at California Air Resources Board Sacramento CA USA
9. National Center for Atmospheric Research Boulder CO USA