1. Department of Internal Medicine, University of Michigan Health System, 4618 Medical Science Building II, Ann Arbor, Michigan 48109
2. Department of Biology, Central Michigan University, 157 Brooks Building, Mount Pleasant, Michigan 48859
3. Research School of Biology, Australian National University, Building 116, Gould Wing, Canberra, ACT 0200, Australia
4. Department of Physiology, Wayne State University, 6112 Scott Hall, Detroit, Michigan 48202
5. Environmental Microbiology Laboratory, Department of Biology, P.O. Box 23360, University of Puerto Rico, San Juan, PR 00931-3360, Puerto Rico
6. Center for Microbial Ecology, and Departments of Crop and Soil Sciences and Microbiology and Molecular Genetics, Michigan State University, 540E Plant and Soil Science, East Lansing, Michigan 48824
7. Microbial Evolution Laboratory, National Food Safety and Toxicology Center, and Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan 48824