1. Southern Ontario Centre for Atmospheric Aerosol Research; University of Toronto; Toronto Ontario Canada
2. Department of Chemistry and Environmental Research Institute; University College Cork; Cork Ireland
3. Laboratory of Atmospheric Chemistry; Paul Scherrer Institute; Villigen Switzerland
4. Now at Institute of Aerosol and Sensor Technology; University of Applied Sciences; Windisch Switzerland
5. Now at TSI GmbH; Aachen Germany
6. Now at Ecotech Pty Ltd.; Knoxfield Australia
7. Leibniz Institute for Tropospheric Research; Leipzig Germany
8. Now at University of Bayreuth; Bayreuth Center of Ecology and Environmental Research; Bayreuth Germany