1. Texas Children's Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, USA
2. Departmentof Biology, Baylor University, Waco, Texas, USA
3. James A Baker III Institute of Public Policy, Rice University, Houston, Texas, USA
4. Scowcroft Institute of International Affairs, Bush School of Government and Public Policy, Texas A&M University, College Station, Texas, USA