9Drummer OH, Opeskin K, Syrjanen M, et al. Methadone toxicity causing death in ten subjects starting on a methadone maintenance program[J]. Am J Forensic Med Pathol, 1992, 13(4) : 346 -350.
10Piane G. Contingency contracting and systematic desensitization for heroin addicts in methadone maintenance programs[J]. J Psychoactive Drugs, 2000, 32(3) : 311 -319.