1. Experience with urine drug testing by the Correctional Service of Canada 
A.D. Fraser, J. Zamecnik, J. Keravel, L. McGrath, J. Wells 
Forensic Science International 
Volume 121, Issue 1, Pages (September 2001)
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2. Fig. 1 Distribution of urine specimens by category in 1999 (N=44,722).
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3. Fig. 2
Distribution of undilute and dilute urine specimens in institutions (I) and the community (C) in 1999.
Forensic Science International  , 16-22DOI: ( /S (01) )

4. Fig. 3
Relative distribution of drugs detected in the CSC testing program in 1999 (N=11,400 positive results).
Forensic Science International  , 16-22DOI: ( /S (01) )

5. Fig. 4 Percent positive drug rate by geographical region of Canada.
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6. Fig. 5
Percent positive rate for individual benzodiazepines in 1999 (N=1659).
Forensic Science International  , 16-22DOI: ( /S (01) )