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Davstad, MA, I.; Stenbacka, PhD, M.; Leifman, MSE, A.; Beck, PhD, O.; Korkmaz, MD, PhD, S.; Romelsjo, MD, PhD, A. Patterns of Illicit Drug Use and Retention in a Methadone Program: A Longitudinal Study. J of Opioid Management 2007, 3, 27-34.