1. The University of Auckland, New Zealand
2. Monash University, Clayton, Victoria, Australia
3. University of South Florida, Tampa
4. Yale University, New Haven, Connecticut
5. Carnegie Mellon University, Pittsburgh, Pennsylvania
6. Columbia University, New York
7. Virginia Polytechnic Institute and State University, Blacksburg, Virginia
8. Landcare Research, Auckland, New Zealand
9. Drexel University, Philadelphia, Pennsylvania
10. University of California Davis, California
11. National Chiao Tung University, Hsinchu City, Republic of China
12. University of Canterbury, Christchurch, New Zealand
13. Southern University, Baton Rouge, Louisiana
14. University of Technology, Sydney, Australia
15. La Trobe University, Melbourne, Australia
16. University of Iowa, Iowa City
17. Crane Environmental Ltd, Surrey, U.K.
18. Michigan Technological University, Houghton