Supporting Future Cannabis Policy – Developing a Standard Joint Unit : A Brief Back-Casting Exercise. Hugo López-Pelayo, Silvia Matrai, Mercè Balcells-Olivero, Eugènia Campeny, Fleur Braddick, Matthijs G. Bossong, Olga S. Cruz, Paolo Deluca, Geert Dom, Daniel Feingold, Tom P. Freeman, Pablo Guzman, Chandni Hindocha, Brian C. Kelly, Nienke Liebregts, Valentina Lorenzetti, Jakob Manthey, João Matias, Clara Oliveras, Maria Teresa Pons, Jürgen Rehm, Moritz Rosenkranz, Zoe Swithenbank, Luc van Deurse, Julian Vicente, Mike Vuolo, Marcin Wojnar and Antoni Gual Frontiers in  Psychiatry, 2021, 12, 675033. doi : 10.3389/fpsyt.2021.675033   The standardization of cannabis doses is a priority for research, policy-making, clinical and harm-reduction interventions and consumer security. Scientists [...]