U.S. Department of Transportation/Federal Motor Carrier Safety Administration
http://www.fmcsa.dot.gov

U.S. Department of Transportation/National Registry of Certified Medical Examiners
http://nrcme.fmcsa.dot.gov

Cost Reduction Technologies (CRT)
http://costreductiontech.com

Iowa Drug Free Workplace Program
http://www.iowa.gov/odcp/drug_free_workplace/creating.html

Substance Abuse and Mental Health Service Administration (SAMHSA)
http://www.samhsa.gov

Drug & Alcohol Testing Industry Association (DATIA)
http://www.datia.org

MEDTOX
http://www.medtox.com