1. Biology and the Built Environment Center, University of Oregon, Eugene, Oregon, USA
2. Genome Center, University of California—Davis, Davis, California, USA
3. Institute for Health and the Built Environment, University of Oregon, Portland, Oregon, USA
4. Department of Evolution and Ecology, University of California—Davis, Davis, California, USA
5. Department of Medical Microbiology and Immunology, University of California—Davis, Davis, California, USA