1. Department of Environmental Epidemiology; Utrecht University; Institute for Risk Assessment Sciences (IRAS); Utrecht The Netherlands
2. Centre for Research in Environmental Epidemiology (CREAL); Barcelona; Spain
3. Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP); Barcelona; Spain
4. Universitat Pompeu Fabra (UPF); Barcelona; Spain
5. Whist Lab; Institute Mines-T; é; lécom/Orange; Paris France
6. Epidemiological Research and Surveillance Unit in Transport; Occupation and Environment (UMRESTTE); Université de Lyon/The French Institute of science and technology for transport, development and networks (IFSTTAR); Lyon France