1. Computational and Applied Mathematics, Institute for Computational Engineering and SciencesUniversity of Texas at Austin, 1 University Station, C0200, Austin, TX 78712, USA
2. Center for Infectious Disease Dynamics, Biology Department, 208 Mueller Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
3. Fogarty International Center, National Institutes of HealthBethesda, MD 20892, USA
4. Section of Integrative Biology and Institute for Cellular and Molecular Biology, University of Texas at Austin, 1 University StationC0930, Austin, TX 78712, USA
5. Santa Fe Institute, 1399 Hyde Park RoadSanta Fe, NM 87501, USA