1. School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts USA
2. Department of Chemistry University of Copenhagen Copenhagen Denmark
3. Department of Earth and Planetary Sciences Harvard University Cambridge Massachusetts USA
4. Wolfson Atmospheric Chemistry Laboratories (WACL), Department of Chemistry University of York York UK
5. Laboratory for Atmospheric Chemistry and Dynamics NASA Goddard Space Flight Center Greenbelt Maryland USA
6. Harvard Smithsonian Center for Astrophysics Cambridge Massachusetts USA
7. Centre for Oceanography and Atmospheric Science, National Centre for Atmospheric Science University of East Anglia Norwich UK
8. Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Sciences University of Manchester Manchester UK
9. Department of Chemistry University of Michigan Ann Arbor Michigan USA
10. Department of Chemistry and Biochemistry University of Colorado Boulder Boulder Colorado USA
11. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA