1. ZEBET, Bundesinstitut für gesundheitlichen Verbraucherschutz und Veterinärmedizin (BgVV), Diedersdorfer Weg 1, D-12277 Berlin, Germany
2. Unilever Research, Colworth House, Sharnbrook, Bedford MK44 1LQ, UK
3. Department of Dermatology, Hautklinik, Universitäts-Krankenhaus Eppendorf, Martiuistrasse 52, D-20246 Hamburg, Germany
4. Photobiology Unit, Department of Dermatology, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
5. Preclinical Safety K135.284, Ciba-Geigy Ltd, CH-4002 Basel, Switzerland
6. Departimento Quimica, Uniuersidad Polytecnica, Valencia, Spain
7. Department of Biocompatibility K.St. 4232, Beiersdorf AG, D-20253 Hamburg 20, Germany
8. Comparative Toxicology Laboratory, Instituto Superiorè di Sanita, I-00161 Rome, Italy;
9. “Department of Transplantology, Institute for Biostructure, University Medical School, Warsaw 02–004, Poland