1. Department of Biology, Portland State University, Portland, Oregon, USA
2. Department of Medicine, Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
3. Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
4. Department of Molecular Microbiology and Immunology, The University of Texas at San Antonio, San Antonio, Texas, USA