1. 2003 Drug Testing Index by Quest Diagnostics, Inc., July 22, 2004.
2. Sample adulteration and on-site drug tests;Cody,2002
3. Mandatory Guidelines for Federal Workplace Drug Testing Programs, April 13, 2004 (69 FR 19644).
4. Detection of abused drugs in oral fluid by an on-site one-step drug screen—Oratect™;Wong;Clin. Chem.,2003
5. Relationship of Δ9-tetrahydrocannabinol concentrations in oral fluid and plasma after controlled administration of smoked cannabis;Huestis;J. Anal. Toxicol.,2004