1. ASRT, Inc., Atlanta, Georgia, USA
2. Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
3. Biotechnology Core Facility Branch, Division of Scientific Resources, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
4. Division of Healthcare Quality Promotion, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
5. Institute of Epidemiology, Disease Control & Research, National Influenza Center, Dhaka, Bangladesh