1. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
2. Department of Chemistry and Biochemistry; University of Colorado Boulder; Boulder Colorado USA
3. California Air Resources Board; El Monte; California USA
4. Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
5. Institute for Meteorology and Climate Research; Karlsruhe Institute of Technology; Karlsruhe Germany
6. Aerodyne Research, Inc.; Billerica Massachusetts USA
7. Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg University of Mainz; Mainz Germany
8. CERN; European Center for Nuclear Research; Geneva Switzerland
9. Department of Physics; University of Helsinki; Helsinki Finland
10. School of Chemical and Biomolecular Engineering; Georgia Institute of Technology; Atlanta Georgia USA
11. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
12. TOFWERK AG; Thun Switzerland