1. Department of Microbiology, Immunology and Pathology, Colorado State University, 3801 W. Rampart Road, Fort Collins, Colorado 80523, USA
2. Bioterrorism Response Laboratory, Hawai‘i Department of Health, State Laboratories Division, 2725 Waimano Home Road, Pearl City, Hawai‘i 96782, USA
3. Department of Biomedical Sciences, Colorado State University, 3801 W. Rampart Road, Fort Collins, Colorado 80523, USA