1. University of Queensland, St. Lucia, Queensland 4072, Australia
2. University of Cambridge, Hills Rd, Cambridge CB2 0QQ, UK
3. Huázhōng Agricultural University, Wǔhàn, PR China
4. Charité, Institute of Virology, Rahel-Hirsch-Weg 3, 10117 Berlin, Germany
5. Okayama University, Kurashiki, 710-0046, Japan
6. Integrated Research Facility at Fort Detrick, NIAID, NIH, Frederick, MD 21702, USA
7. University of Texas Medical Branch, Galveston, TX 77555-0609, USA