Cheryl A. Nickerson, School of Life Sciences, The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, AZ, USANeal R. Pellis, Division of Space Life Science, Universities Space Research Association, Houston, TX, USAC. Mark Ott, Biomedical Research and Environmental, Sciences Division, NASA/Johnson Space Center, Houston, TX, USA