1. Department of Biology, Colorado State University, Fort Collins 80523
2. Department of Ecology and Evolutionary Biology, CU Boulder, Boulder, CO 80309, and Department of Animal Sciences, Colorado State University, Fort Collins 80523
3. Department of Biochemistry and Microbiology, University of Chemistry and Technology, 166 28, Prague, Czech Republic
4. Bioscience, Wageningen University and Research, 6708 PB 4, Wageningen, The Netherlands
5. Departments of Pediatrics and Computer Science & Engineering, and Center for Microbiome Innovation, University of California at San Diego, La Jolla 90203