1. Center for Vector Biology and Zoonotic Diseases and Northeast Regional Center for Excellence in Vector-Borne Diseases, Connecticut Agricultural Experiment Station , New Haven, Connecticut , USA
2. Yale University School of Public Health , New Haven, Connecticut , USA
3. Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention , Fort Collins, Colorado , USA
4. Pennsylvania Department of Environmental Protection , Harrisburg, Pennsylvania , USA