Oral-fluid drug testing for marijuana has a shorter detection window, up to 72 hours after use, which could increase marijuana use among truckers, experts say. Story by Eric Miller.Ìý
Ìý
For the full story, visit:Ìý/articles/dot-oral-drug-testingÌý
Subscribe to Transport Topics:ÌýÌý
Ìý
Ìý
Ìý
Ìý
Ìý
Ìý
Ìý
Ìý
Ìý