1. Validity of oral fluid test for Delta-9-tetrahydrocannabinol in drivers using the 2013 National Roadside Survey Data Jin, Huiyan; Williams, Sharifa Z.; Chihuri, Stanford T.; Li, Guohua; Chen, Qixuan 2018 Articles MarijuanaDrug testingDrugged drivingTetrahydrocannabinolEpidemiology