However, from 2013 to 2023, there was a decrease in heroin concentration. (HealthDay News) — Absolute concentrations of fentanyl, methamphetamine, and cocaine in urine specimens increased from 2013 to ...
About The Study: This cross-sectional study found that absolute concentrations of fentanyl, methamphetamine, and cocaine in urine specimens increased from 2013 to 2023, with a decrease in heroin ...
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