1 Baylor College of Medicine, School of Medicine and National School of Tropical Medicine, Houston, Texas, United States of America.
2 Baylor College of Medicine, School of Medicine and National School of Tropical Medicine, Houston, Texas, United States of America; Sabin Vaccine Institute and Texas Children's Hospital Center for Vaccine Development, Houston, Texas, United States of America; James A Baker III Institute for Public Policy, Rice University, Houston, Texas, United States of America; Department of Biology, Baylor University, Waco, Texas, United States of America.
3 Baylor College of Medicine, Department of Otolaryngology-Head and Neck Surgery, Houston, Texas, United States of America.