1. Federal Institute for Health Protection of Consumer and Veterinary Medicine, Thielallee 88 – 92, Berlin D-14195, Germany
2. National Residue Survey, National Office of Food Safety, GPO Box 858, Canberra ACT 2601, Australia
3. FAPAS Secretariat, CSL, Sand Hutton, Yorkshire, YO41 1LZ, UK
4. Inspectorate for Health Protection, Hoogte Kadijk 401, NL- 1018 BK, Amsterdam, The Netherlands
5. Berliner Betrieb fuer Zentrale Gesundheitliche Aufgaben, Invalidenstrasse 60, D-10557 Berlin, Germany