1. Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, USA
2. Department of Biological Sciences, Florida International University, Miami, Florida, USA
3. Investigative Biology Teaching Laboratories, Cornell University, Ithaca, New York, USA
4. Department of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado, USA
5. Department of Biology, Hampden-Sydney College, Hampden-Sydney, Virginia, USA