1. Peter Boris Centre for Addictions Research; McMaster University and St Joseph's Healthcare Hamilton; Hamilton ON Canada
2. Michael G. DeGroote Centre for Medicinal Cannabis Research; McMaster University; Hamilton ON Canada
3. Department of Applied Behavioral Science; The University of Kansas; Lawrence KS USA
4. Center for Alcohol and Addiction Studies; Brown University; Providence RI USA
5. Providence VA Medical Center; Providence RI 02908 USA
6. Homewood Research Institute; Guelph ON Canada