About the Authors
Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America
Department of Microbiology and Immunology, Katholieke Universiteit Leuven, Leuven, Belgium
Virus and Prion Diseases of Livestock Research Unit, National Animal Disease Center, USDA-ARS, Ames, Iowa, United States of America
Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America
The University of Minnesota Veterinary Diagnostic Laboratory, St. Paul, Minnesota, United States of America
Departments of Biomathematics and Human Genetics, David Geffen School of Medicine at UCLA, and Department of Biostatistics, UCLA School of Public Health, Los Angeles, California, United States of America
Institute of Evolutionary Biology, University of Edinburgh, Ashworth Laboratories, Edinburgh, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MIN PL MAS AR ECH. Performed the experiments: AV SD MG. Analyzed the data: MIN PL YT TTYL MAS CV AR ECH. Wrote the paper: MIN PL AV CV MAS AR ECH MG.