1. Division of Infectious Diseases, Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
2. Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
3. Department of Biology, Niagara University, Niagara Falls, New York, USA
4. Department of Microbiology, University of Georgia, Athens, Georgia, USA
5. Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
6. Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA