Source
1: Oak Ridge Inst. for Science and Education (ORISE) (2007). Drug Retention Times. doi.org/10.2172/908420.
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2: Substance Abuse and Mental Health Services Administration. Clinical Drug Testing in Primary Care. Technical Assistance Publication (TAP) 32. HHS Publication No. (SMA) 12-4668. Rockville, MD: Substance Abuse and Mental Health Services Administration, 2012.
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3: Christo PJ, Manchikanti L, Ruan X, et al. Urine drug testing in chronic pain. Pain Physician. 2011;14(2):123-143.
