1 The Institute for Cellular and Molecular Biology, The University of Texas, Austin, Texas, United States of America; Center for Computational Biology and Bioinformatics, The University of Texas at Austin, Austin, Texas, United States of America; Department of Integrative Biology, The University of Texas at Austin, Austin, Texas, United States of America.
2 Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America; Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, United States of America.