1. The Netherlands Organisation for Applied Scientific Research TNO, Delft, the Netherlands
2. Ministry of Housing Spatial Planning and the Environment—DG-Environment, The Hague, the Netherlands
3. The Nofer Institute of Occupational Medicine, Lodz, Poland
4. Aarhus University, Department of Environmental & Occupational Medicine, Aarhus, Denmark
5. Public Health Services Gelderland Midden, Arnhem, the Netherlands
6. Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA