title: Response to Li et al. (2017): Cannabis use and crash risk in drivers.
authors.affiliation: Ragnar Frisch Centre for Economic Research, Oslo, Norway.
authors.forename: Ole
authors.initials: O
authors.lastname: Rogeberg
authors.affiliation: Institute of Transport Economics, Norwegian Centre for Transport Research, Oslo, Norway.
authors.forename: Rune
authors.initials: R
authors.lastname: Elvik
mesh_terms: D001334:Automobile Driving; D002188:Cannabis; D000066448:Driving Under the Influence; D006213:Hallucinogens
chemical_list: D006213:Hallucinogens
keywords: Cannabis; DUI; case-control; culpability; driving; driving under the influence; impairment; marijuana; meta-analysis