1. Unit of Industrial Toxicology and Occupational Medicine, Faculty of Medicine, Catholic University of Louvain, Belgium
2. Centre de recherches en santé-travail-ergonomie-Laboratoire Universitaire de Médecine du Travail, Université Lille 2, Lille, France
3. Laboratorio di Tossicologia Industriale, Universita degli Studi di Parma, Parma, Italy
4. National Institute of Public Health, Prague, Czech Republic
5. Nofer Institute of Occupational Medicine, Lodz, Poland