1. Laboratory of Atmospheric Chemistry Paul Scherrer Institute Villigen Switzerland
2. Now at Department of Meteorology Stockholm University Stockholm Sweden
3. Laboratoire de Glaciologie et Géophysique de l'Environnement Université Grenoble Alpes/CNRS Grenoble France
4. Now at Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany
5. Leibniz Institute for Tropospheric Research Leipzig Germany
6. Institute of Meteorology and Climate Research Karlsruhe Institute of Technology Karlsruhe Germany
7. Centre for Atmospheric Science, SEAES University of Manchester Manchester UK
8. Particle Chemistry Department Max Planck Institute for Chemistry Mainz Germany
9. Now at Institute for Aerosol and Sensor Technology University of Applied Sciences Windisch Switzerland