1. Norwegian Veterinary Institute, P.O. Box 750
Sentrum, N-0106 Oslo, Norway
2. AgResearch Ltd., Ruakura Research Centre, Hamilton 3214, New Zealand
3. Marine Institute, Rinville, Oranmore, County Galway H91 R673, Ireland
4. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43220, United States
5. National Research Council Canada, 1411 Oxford St, Halifax, NS B3H 3Z1, Canada