1. UK Centre for Astrobiology, School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
2. Space Science and Astrobiology Division, NASA Ames Research Center, Moffett Field, California.
3. California Institute of Technology/NASA Jet Propulsion Laboratory, Pasadena, California.
4. European Astronaut Centre, Cologne, Germany.
5. STFC Boulby Underground Laboratory, Boulby, United Kingdom.