1 Division of Infection and Global Health Research, School of Medicine, University of St Andrews, St Andrews, UK.
2 Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Canada.
3 Division of Infectious Diseases, University of Toronto, Toronto General Hospital, Toronto, Canada.
4 Laboratory of Emerging and Re-emerging Viruses, Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Canada.