1. School of Biological Sciences Georgia Institute of Technology Atlanta GA USA
2. School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta GA USA
3. NASA Astrobiology Institute, Alternative Earths Team Mountain View CA USA
4. Department of Genome Sciences University of Washington Seattle WA USA
5. Department of Microbiology and Immunology University of British Columbia Vancouver BC Canada
6. Department of Earth, Ocean, and Atmospheric Sciences University of British Columbia Vancouver BC Canada
7. Department of Microbiology and Immunology Montana State University Bozeman MT USA