Funding for this research was provided by:
Public Health Agency of Canada
Received: 30 May 2017
Accepted: 18 December 2017
First Online: 26 January 2018
Ethics approval and consent to participate
: The University of British Columbia Research Ethics Board approved the protocol. All participants provided consent to participate. Assent was also obtained for children under 16 years of age.
: Not applicable.
: The authors declare that they have no competing interests.
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