1. Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention (CDC), Atlanta, Georgia
2. Epidemiological Modelling Unit, Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
3. Modeling Unit and Office of the Director, National Center for Immunization and Respiratory Diseases, CDC
4. IHRC, Inc, Atlanta, Georgia