1. Institute for Risk Assessment Sciences, Division Environmental Epidemiology, Utrecht University, Utrecht, the Netherlands
2. National Institute for Public Health and the Environment, Centre for Environmental Health, Bilthoven, the Netherlands
3. Energy Research Centre of the Netherlands, Department of Air Quality, Petten, the Netherlands
4. Municipal Health Service Amsterdam, Department of Environmental Health, Amsterdam, the Netherlands
5. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands