Cost-effective drug testing.
D000428:Alcohol Drinking; D003042:Cocaine / Q000652:urine; D003362:Cost-Benefit Analysis; D006801:Humans; D002189:Marijuana Abuse; D009787:Occupational Medicine / Q000191:economics*; D019966:Substance-Related Disorders / Q000191:economics* / Q000517:prevention & control
D003042:Cocaine