1. Central Science Laboratory, Sand Hutton, North Yorkshire YO4 1LZ, UK
2. Department of Health Risk Analysis, University of Limburg, 6200 MD Maastricht, The Netherlands
3. Institut für Hygiene und Arbeitsmedizin, Universitäts-klinikum Essen, Hufelandstrasse 55, 4300 Essen, Germany
4. Laboratorio di Biocompatibilità dei Materiali da Impianto, Istituti Ortopedici Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy
5. Department of Biological Sciences, Napier University, 10 Golinton Road, Edinburgh EH10 5DT, UK
6. INRS Laboratoire de Carcinogenèse In Vitro, Avenue de Bourgogne, 54501 Vandoeuvre Les Nancy Cedex, France
7. Department of Applied Physics, Chalmers University of Technology, University of Gothenburg, 412 96 Gothenburg, Sweden
8. INSERM, U139, Faculté de Medicine, 8 rue du General Sarrail, 94010 Créteil Cedex, France
9. Department of Pathology and Laboratory Medicine, Division of Biology and Medicine, Brown University, Providence, RI 02912, USA
10. Industrial Toxicology and Occupational Medicine, Catholic University of Louvain, Clos Chapelle-aux-Champs 30.54, 1200 Brussels, Belgium
11. Fraunhofer Institut Toxikologie und Aerosol-forschung, Nikolai-Fuchs-Strasse 1, 30625 Hannover, Germany