1. Toxicology Division, TNO Nutrition and Food Research Institute, Utrechtseweg 48, 3704 HE Zeist, The Netherlands;
2. Life Sciences Research, L'Oréal Advanced Research, Central Department of Products Safety, 1 Avenue Eugene Schueller, 93600 Aulnay-sous-Bois, France;
3. Rhône-Poulenc, BP 153, 355 Rue Dostoievski, 06903 Sophia Antipolis Cedex, France;
4. Department of Dermatology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands;
5. Istituto di Scienze Farmacologiche, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy;
6. School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, UK;
7. Forschungsschwerpunkt Tumorzellregulation, Abteilung Differenzierung und Carcinogenese, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany;
8. ZEBET, BgVV, Diedersdorfer Weg 1, 12277 Berlin, Germany;
9. School of Biological Sciences, University of Surrey, Guildford, Surrey GU2 5XH, UK;
10. Preclinical Safety, Toxicology & Pathology, Novartis Pharma AG, WS.2881.P.09, 4002 Basel, Switzerland;
11. Department of Dermatology, University of Erlangen, Hantmannstrasse 14, 91052 Erlangen, Germany