About the Authors
Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
Texas AgriLife Research, Amarillo, Texas, United States of America
Center For Food Security/Public Health, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
National Farm Medicine Center, Marshfield Clinic, Marshfield, Wisconsin, United States of America
Centre for Public Health and Zoonoses, and Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: AO. Analyzed the data: AO. Wrote the paper: AO. Reviewed papers, participated in meetings and commented on manuscript drafts: BA DB-W SK JS AR SVE.