About the Authors
Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin, United States of America
Department of Parasitology, Center for Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
The authors have declared that no competing interests exist.
Conceived and designed the experiments: TPY X-JW CHH. Performed the experiments: X-JW HL LAG. Analyzed the data: TPY X-JW AMD CHH. Contributed reagents/materials/analysis tools: AMD CHH. Wrote the paper: TPY. Reviewed/revised manuscript: LAG X-JW CHH AMD. Prepared figures: X-JW LAG. Financial support: TPY.