1. Department of Veterinary Population Medicine; University of Minnesota; St. Paul MN USA
2. Department of Veterinary and Biomedical Sciences; University of Minnesota; St. Paul MN USA
3. Department of Epidemiology; University of Washington; Seattle WA USA
4. Division of Environmental Health Sciences; School of Public Health; University of Minnesota; Minneapolis MN USA
5. Department of Population Medicine and Centre for Public Health and Zoonoses; Ontario Veterinary College; University of Guelph; Guelph ON Canada
6. Veterinary Medical Library; University of Minnesota; St. Paul MN USA
7. Instituto de Medicina Preventiva Veterinaria; Facultad de Ciencias Veterinarias; Universidad Austral de Chile; Valdivia Chile