1. Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo, Norway
2. Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo, Norway
3. Institute for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
4. IRCELYON, CNRS, University of Lyon, 69626 Villeurbanne, France
5. Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York YO10 5DD, United Kingdom
6. Department of Chemistry and Molecular Biology, Atmospheric Science, University of Gothenburg, 41296 Gothenburg, Sweden
7. Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway