CesarLeos-Toro University of Zurich Zurich, Switzerland In programme November 24 10:50 to 12:20 View hours & dates Hours & Dates Thursday, 24 November 10:50 Oral presentation 2. Patterns of problematic cannabis use among Canadian and US respondents between 2018 and 2020: Findings from the International Cannabis Policy Study 10:50 to 12:20 Knowledge market 1 (K1) Cesar Leos-Toro