1. University of California, San Diego, Department of Pediatrics, La Jolla, California, USA
2. University of California, San Diego, Scripps Institution of Oceanography, La Jolla, California, USA
3. Southern California Coastal Water Research Project, Microbiology Group, Costa Mesa, California, USA
4. Environment, Exposure Science and Risk Assessment Center, University of Arizona Mel and Enid Zuckerman College of Public Health, Tucson, Arizona, USA
5. J. Craig Venter Institute, Environmental and Microbial Genomics Group, La Jolla, California, USA