Sousa-Reis Cláudia Psychiatry Resident Centro Hospitalar Universitário de São João Portugal In Programme October, 23 14:20 to 15:50 Hours & Dates Wednesday, October 23 14:20 Oral presentation The challenge of cannabis quantification: from theory to practice 14:20 to 15:50 Room 1.07 Cláudia Sousa-Reis