title: Letter to the editor.
authors.forename: Isaac I
authors.initials: II
authors.lastname: Bogoch
authors.affiliation: Tropical Diseases Unit, Division of Infectious Diseases.
authors.forename: Isaac I
authors.initials: II
authors.lastname: Bogosh
authors.affiliation: Tropical Diseases Unit, Toronto General Hospital, Toronto, Ontario.
authors.forename: Sumon
authors.initials: S
authors.lastname: Chakrabarti
authors.affiliation: Tropical Diseases Unit, Toronto General Hospital, Toronto, Ontario.
authors.forename: Jay S
authors.initials: JS
authors.lastname: Keystone