1. Department of Health and Human Services, Healthcare Financing Administration, Public Health Service. 42CFR Part 405, et al. Clinical Laboratory Improvement Amendments of 1988; Final rule. February 28, 1992 (57 FR 7001).
2. Department of Health and Human Services, Substance Abuse and Mental Health Services Administration. Mandatory guidelines for Federal Workplace Drug Testing Programs: Notice. May 15, 2015 (80 FR 28054).
3. The U.S. mandatory guidelines for federal workplace drug testing programs: current status and future considerations;Bush;Forensic Sci. Int.,2008
4. Clinical issues associated with urine testing of substances of abuse;Eskridge;Pharmacotherapy,1997
5. Detection times of drugs of abuse in blood, urine and oral fluid;Verstraete;Ther. Drug Monit.,2004