1. Center for Surface Chemistry & Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, 3001 Heverlee, Belgium
2. Industrial Toxicology and Occupational Medicine unit, Université catholique de Louvain, Avenue E. Mounier, 53.02, 1200 Brussels, Belgium
3. Laboratory of Cell Genetics, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium
4. Laboratory of Lung Toxicology, Katholieke Universiteit, Herestraat 49, 3000 Leuven, Belgium