1. Division of Genetic Toxicology, NCTR, NCTR Drive, Jefferson, AR 70279, USA
2. BIOMET Department, GlaxoWellcome, Building 2, Park Road, Ware SG12 ODP, UK
3. Drug Metabolism & Pharmacokinetics, Novartis Pharmaceutical Corporation, 59 route 10, East Hanover, NJ 07936, USA
4. Deutsches Institut für Ernährungsforschung Abtl. Ernährungstoxikologie, Arthur-Scheunert-Allee 114–116, 14558 Bergholz-Rehbrücke, Germany
5. RITOX, Utrecht University, 3508 TD Utrecht, The Netherlands
6. Laboratory of Carcinogenesis/Mutagenesis, NIEHS, Research Triangle Park, NC 27709, USA
7. Department of Biochemical Pharmacology, Janssen Pharmaceutica NV, Turnhoutsebaan 30, 2340 Beerse, Belgium
8. Dipartimento di Scienze dell'Ambiente e del Territorio, Università di Pisa, Via S. Giuseppe 22, 56100 Pisa, Italy
9. INSERM U246, Faculté de Médecine Xavier Bichat, 16 rue Henri Huchard, 75018 Paris, France