1. School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale, IL 62901, USA.
2. Carbondale High School, Carbondale, IL 62901, USA.
3. Department of Microbiology, Southern Illinois University, Carbondale, IL 62901, USA.
4. Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, IL 62901, USA.
5. Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL 62901, USA.
6. Department of Medical Microbiology, Immunology and Cell Biology, School of Medicine, Southern Illinois University, Springfield, IL 62702, USA.
7. Integrated Microscopy and Graphics Expertise (IMAGE) Center, Southern Illinois University, Carbondale, IL 62901, USA.