1. Department of Health Risk Analysis and ToxicologyMaastricht University 6200 MD Maastricht The Netherlands
2. Department of Industrial Hygiene and ToxicologyFinnish Institute of Occupational Health Helsinki Finland
3. Department of Cardiothoracic SurgeryAcademical Medical CenterUniversity of Amsterdam Amsterdam The Netherlands
4. Laboratory of Biochemical Risk AnalysisNational Institute of Environmental Health Sciences Research Triangle Park North Carolina 27709 USA
5. Department of CardiologyAcademical Medical CenterUniversity of Amsterdam Amsterdam The Netherlands