1. Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
2. Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin, USA
3. Microbial Diversity 2020, University of Chicago Marine Biological Laboratory, Falmouth, Massachusetts, USA
4. Department of Medicine, Division of Infectious Diseases, Washington University School of Medicine, St. Louis, Missouri, USA
5. Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, Missouri, USA
6. Department of Microbiology, University of Illinois, Urbana, Illinois, USA
7. Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois, USA
8. Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, California, USA