Seizures of illicit substances for personal use in two Italian provinces: analysis of trends by type and purity from 2008 to 2017. - Verri, Patrizia; Rustichelli, Cecilia; Ferrari, Anna; Marchesi, Filippo; Baraldi, Carlo; Licata, Manuela; Vandelli, Daniele; Palazzoli, Federica; Potì, Francesco; Silingardi, Enrico (Substance Abuse Treatment, Prevention & Policy, 2019)