2 School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; Victorian Infectious Disease Service, Royal Melbourne Hospital at the Doherty Institute for Infection and Immunity, Melbourne, Australia.
3 Department of Infection, Hospital for Tropical Diseases, London, UK; National Travel Health Network and Centre, Public Health England, London, UK.
4 Tropical Disease Unit, Department of Medicine, University of Toronto, Toronto, ON, Canada; Sandra Rotman Centre for Global Health, University Health Network - Toronto General Hospital, Toronto, ON, Canada.
5 Department of Global Health, Boston University School of Public Health, Boston, MA, USA; Section of Infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA.
6 J.D. MacLean Centre for Tropical Medicine, McGill University, Montreal, Canada.