1. Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555, United States
2. Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina 27710, United States
3. Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
4. MIVEGEC, IRD, CNRS, Université de Montpellier, Montpellier 34090, France