1. Department of Chemistry University of Toronto Toronto Ontario Canada
2. Department of Environmental Sciences and Engineering University of North Carolina Chapel Hill North Carolina USA
3. Department of Chemistry and Biochemistry University of California, San Diego La Jolla California USA
4. Department of Chemistry University of California Irvine California USA
5. Environmental and Occupational Health Sciences Institute Rutgers University Piscataway New Jersey USA
6. Department of Chemistry University of Colorado Boulder Colorado USA
7. Cooperative Institute for Research in Environmental Sciences (CIRES) Boulder Colorado USA