1. Carnegie Mellon University, Department of Chemistry, Pittsburgh, PA, USA
2. University of California, Irvine Department of Chemistry, Irvine, CA, USA
3. Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt Am Main, Germany
4. Institute of Materials Chemistry, TU Wien, 1060 Vienna, Austria
5. Faculty of Physics, University of Vienna, 1090 Vienna, Austria
6. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
7. University of Chicago, Department of the Geophysical Sciences, Chicago, IL, USA
8. Atmospheric Chemistry Observations and Modeling Laboratory, U.S. National Science Foundation National Center for Atmospheric Research (NSF NCAR), Boulder, Colorado 80301, USA
9. Institute for Atmospheric and Earth System Research/Physics, University of Helsinki, Helsinki 00014, Finland
10. Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland
11. Department of Chemistry, CIRES, University of Colorado Boulder, Boulder, CO 80309-0215, USA
12. Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
13. Lebedev Fisysical Institute, 119991, Moscow, Leninsky Prospect 53, Russia
14. School of Civil and Environmental Engineering, Pusan National University, Busan, 46241, Republic of Korea
15. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
16. CERN, The European Organization for Nuclear Research, Geneve 23 CH-1211, Switzerland
17. Carnegie Mellon University Department of Chemical Engineering, Pittsburgh, PA, USA
18. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
19. Moscow Institute of Physics and Technology (National Research University), 141701 Moscow, Russia
20. Ion Molecule Reactions & Environmental Physics Group Institute of Ion Physics and Applied Physics Leopold-Franzens University, Innsbruck Technikerstraße 25, A-6020 Innsbruck, Austria
21. Swiss Federal Research Institute WSL, Plant Regeneration Ecology, Birmensdorf, CH-8903, Switzerland
22. Joint International Research Laboratory of Atmospheric and Earth System Research, School of Atmospheric Sciences, Nanjing University, Nanjing, China
23. Aerosol Physics Laboratory, Physics Unit, Tampere University, FI-33014 Tampere, Finland