1. Lovelace Respiratory Research Institute, Albuquerque, New Mexico, USA
2. University of New Mexico, Albuquerque, New Mexico, USA
3. Atmospheric Research and Analysis Inc., Cary, North Carolina, USA
4. Southern Company, Birmingham, Alabama, USA
5. Georgia Institute of Technology, Atlanta, Georgia, USA
6. University of Georgia, Athens, Georgia, USA
7. SKS Consulting Services, Siler City, North Carolina, USA