3Biochemical Pharmacology, University of Konstanz, P.O. Box M 655, 78457 Konstanz, Germany; 4National Institute of Public Health (NIPH), Department of Vaccinology, P.O. Box 4404 Torshov, Geitmyrsveien 75, 0403 Oslo, Norway; 5Milenia-Biotec, Hohe Strasse 4–8, 61231 Bad Nauheim, Germany; 6Medical Products Agency, P.O. Box 26, Husargatan 8, 751 03 Uppsala, Sweden; 7European Directorate for the Quality of Medicines, Council of Europe, P.O. Box 907, 67029 Strasbourg Cedex 1, France; 8ECVAM, JRC Institute for Health and Consumer Protection, European Commission, 21020 Ispra (VA), Italy; 9Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse 51–59, 63225 Langen, Germany; 10National Institute for Public Health and the Environment (RIVM), LGM, P.O. Box 1, 3720 BA Bilthoven, The Netherlands; 11Analysis and Control Department, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark; 12Pharma Hameln GmbH, Langes Feld 13, 31789 Hameln, Germany; 13Division of Endocrinology, National Institute for Biological Standards and Control (NIBSC), Blanche Lane, South Mimms, Potters Bar, Hertfordshire EN6 3QG, UK; 14Office of Testing and Research, Center for Drug Evaluation and Research, Food and Drug Administration, FD-900, Parklawn Building, Room 13B-06, 5600 Fishers Lane, Rockville, MD 20857, USA; 15Institut fur Medizinische Chemie und Biochemie, Universitat Innsbruck, Fritz-Pregl-Strasse 3, 6020 Innsbruck, Austria ATLA 29, 99–123, 2001 99