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 301-308 (January 2000) DOI: 10.1016/S0379-0738(99)00173-5

Fig. 1 Sex distribution of heroin and/or cocaine users. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 2 Residence distribution of heroin and/or cocaine users. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 3 Age distribution of heroin and/or cocaine users. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 4 Drug/age distribution of users. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 5 Licence distribution of heroin and/or cocaine users. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 6 Positives distribution. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)

Fig. 7 Distribution of positive and negative cases at the second control. Forensic Science International 2000 107, 301-308DOI: (10.1016/S0379-0738(99)00173-5)