1. University of California—Berkeley, Berkeley, California, United States
2. Quantis, Lausanne, Switzerland
3. University of Minnesota, Minneapolis, Minnesota, United States
4. University of Michigan, Ann Arbor, Michigan, United States
5. Environmental Research Consultant, SERC, United States
6. École des Mines de Paris, Paris, France
7. Harvard University, Boston, Massachusetts, United States
8. University of Stuttgart, Stuttgart, Germany
9. Lawrence Berkeley National Laboratory, Berkeley, California, United States