Published on in Vol 6 , No 4 (2018) :April

1 Independent Researcher , Vancouver , BC , CA
2 Faculty of Medicine , University of British Columbia , Vancouver , BC , CA
3 Research Associate Professor , Department of Health Behavior and Health Education , University of Michigan , Ann Arbor , MI , US
4 Centre for Behaviour Change , University College London , London , GB
5 Division of Infectious Diseases , Department of Medicine , University of British Columbia , Vancouver , BC , CA
*these authors contributed equally