1. Biostatistics, Biomathematics, Pharmacoepidemiology, and Infectious Diseases Unit, Institut Pasteur, Inserm U1181, University of Versailles St-Quentin-en-Yvelines, Versailles, France
2. Odum School of Ecology, University of Georgia, Athens
3. Department of Infectious Diseases, University of Georgia, Athens
4. Center for the Ecology of Infectious Diseases, University of Georgia, Athens
5. Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor
6. Department of Mathematics, University of Michigan, Ann Arbor
7. Center for the Study of Complex Systems, University of Michigan, Ann Arbor