temps (durée) (1) état (1) persistance (1) surveillance (1) innovation (1) épidémie (1) toxicomanie (1) diffusion (1) ville (1) Washington (1) Drug use (1) Drug testing (1) Monitoring (1) Treatment (1) Nineteen nineties (1) States (1) Criminal methods (1) Drug testing (1) Crack (Drug) (1) Urine--Analysis (1) Time (1) Persistence (1) Methamphetamine (1) Markets (1) Marijuana (1) Heroin (1) Growth (1) Estimates (1) Epidemics (1) Drugs (1)