1. Department of Chemistry – Ångström Laboratory, Uppsala University, SE-751 21 Uppsala, Sweden
2. Vehicular Systems, Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden
3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, China
4. Volvo Car Corporation, SE-405 31, Gothenburg, Sweden