1. Hair analysis for driving licence in cocaine and heroin users.
Maria Cristina Ricossa, Marzia Bernini, Francesco De Ferrari 
Forensic Science International 
Volume 107, Issue 1, Pages (January 2000)
DOI: /S (99)

2. Fig. 1 Sex distribution of heroin and/or cocaine users.
Forensic Science International  , DOI: ( /S (99) )

3. Fig. 2 Residence distribution of heroin and/or cocaine users.
Forensic Science International  , DOI: ( /S (99) )

4. Fig. 3 Age distribution of heroin and/or cocaine users.
Forensic Science International  , DOI: ( /S (99) )

5. Fig. 4 Drug/age distribution of users.
Forensic Science International  , DOI: ( /S (99) )

6. Fig. 5 Licence distribution of heroin and/or cocaine users.
Forensic Science International  , DOI: ( /S (99) )

7. Fig. 6 Positives distribution.
Forensic Science International  , DOI: ( /S (99) )

8. Fig. 7
Distribution of positive and negative cases at the second control.
Forensic Science International  , DOI: ( /S (99) )