1 Department of Population Medicine, University of Guelph, Guelph, ON N1G 2W1, Canada. Electronic address: smcewen@uoguelph.ca.
2 Division of Global Health Protection, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA.
3 Infectious Diseases and Microbiology, Canberra Hospital, Canberra, ACT, Australia; Medical School, Australian National University, Acton, ACT, Australia.
4 Departments of Medicine, Microbiology, Immunology & Infectious Diseases, and Pathology & Laboratory Medicine, Synder Institute for Chronic Diseases and O'Brien Institute for Public Health, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, AB Canada.