1. Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
2. Centre
for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
3. Transportation
Research Institute (IMOB), Hasselt University, Wetenschapspark 5/6, 3590 Diepenbeek, Belgium
4. Centre
for Environmental Policy, Imperial College London, Exhibition Road, South Kensington Campus, London SW7 2AZ, U.K.
5. ISGlobal, Centre for Research in Environmental
Epidemiology (CREAL), C/Dr. Aiguader 88, 08003 Barcelona, Spain
6. Pompeu Fabra University (UPF), C/Dr.
Aiguader 88, 08003 Barcelona, Spain
7. CIBER Epidemiología y Salud Pública (CIBERESP), C/Monforte de Lemos 3-5, 28029 Madrid, Spain
8. Department
of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado 80523, United States
9. Physical
Activity and Health Unit, Epidemiology, Biostatistics and Prevention
Institute, University of Zurich, Seilergraben 49, 8001 Zurich, Switzerland