1 Texas Children's Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America.
2 Center for Medical Ethics and Health Policy, Baylor College of Medicine, Houston, Texas, United States of America.
3 Department of Biology, Baylor University, Waco, Texas, United States of America.
4 James A. Baker III Institute for Public Policy, Rice University, Houston, Texas, United States of America.
5 Scowcroft Institute of International Affairs, Bush School of Government and Public Service, Texas A&M University, College Station, Texas, United States of America.