1. Food Safety Programme, Institute of Environmental Science and Research Ltd.; Christchurch New Zealand
2. Peter Medawar Building for Pathogen Research and Department of Zoology; Health Protection Agency and University of Oxford; Oxford OX1 3SY United Kingdom
3. Produce Safety and Microbiology Research Unit; United States Department of Agriculture; Albany CA 94710
4. Water Management Programme, Institute of Environmental Science and Research Ltd.; Christchurch New Zealand