Crash-involved THC-positive drivers in Norway have a high frequency of polysubstance use Posted on February 13, 2023 By Becky Carter Hallvard Gjerde, Stig Tore Bogstrand, Ragnhild Elén Gjulem Jamt, Vigdis Vindenes Drug Alcohol Depend; 244; 2023 Access article Cannabis and Cannabinoids, Chemistry, Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Seized Drugs/Controlled Substances, Toxicology