1. Biotechnology and Planetary Protection Group, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.
2. Institute for Microbiology and Archaea Center, University of Regensburg, Regensburg, Germany.
3. Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA.
4. Matis ohf. Food Safety, Environment and Genetics, Reykjavik, Iceland.