1. Wadsworth Center, New York State Department of Health Albany NY USA
2. Now at Selected Lab Partners Greensboro NC USA
3. Atmospheric Sciences Research Center University at Albany Albany NY USA
4. Department of Atmospheric and Oceanic Science, University of Maryland College Park MD USA
5. NOAA Earth System Research Laboratory Global Monitoring Division Boulder CO USA
6. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
7. Department of Environmental Health Sciences University at Albany Albany NY USA