1. SETI Institute, Mountain View, California, USA.
2. Space Telescope Science Institute, Baltimore, Maryland, USA.
3. Virtual Planetary Laboratory, University of Washington, Seattle, Washington, USA.
4. NASA Ames Research Center, Moffett Field, California, USA.
5. Department of Biology and Washington University in St. Louis, St. Louis, Missouri, USA.
6. Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri, USA.
7. National Institute of Standards and Technology, Gaithersburg, Maryland, USA.
8. Institute of Plant Biology, Hungarian Academy of Sciences, Szeged, Hungary.
9. Space Research and Planetary Sciences, University of Bern, Bern, Switzerland.
10. Department of Earth and Planetary Sciences, University of California, Riverside, Riverside, California, USA.
11. Department of Astronomy, University of Florida, Gainesville, Florida, USA.
12. Department of Astronomy, University of Washington, Seattle, Washington, USA.