1. Microbial and Environmental GenomicsJ. Craig Venter Institute, La Jolla, CA, USA
2. School of DentistryUniversity of California, Los Angeles, CA, USA
3. Department of PathologyUniversity of California, San Diego, CA, USA
4. Western University College of Dental Medicine, Pomona, CA, USA
5. Department of MedicineUniversity of California, San Diego, CA, USA