Canna~Fangled Abstracts Longitudinal study of hippocampal volumes in heavy cannabis users. J Psychopharmacol. 2017 Jul 1:269881117718380. doi: 10.1177/0269881117718380. Koenders L1, Lorenzetti V2,3, de Haan L1, Suo…Freedom WaresJuly 1, 2017