1. Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
2. Environmental Risk & Health unit, VITO (Flemish Institute of Technological Research), Mol, Belgium
3. Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
4. Environment and Health unit, Provincial Institute of Hygiene, Antwerp, Belgium
5. Transportation Research Institute, Hasselt University, Hasselt, Belgium
6. Department of Public Health, Occupational & Environmental Medicine, Leuven University, Leuven, Belgium