title: Letter: Effects of marihuana on flying ability.
mesh_terms: D000056:Accident Prevention; D000337:Aerospace Medicine; D002188:Cannabis / Q000009:adverse effects*; D002986:Clinical Trials as Topic; D006801:Humans; D009048:Motor Skills / Q000187:drug effects; D010919:Placebos; D019966:Substance-Related Disorders
chemical_list: D010919:Placebos