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Ducray, Kevin and Byrne, Patricia and Burke, Clare and Smyth, Bobby P (2011) A comparison of the drug use patterns, measures of needs and quality of life of methadone-maintained patients using and not using cocaine. Heroin Addiction and Related Clinical Problems , 13 , (3) , pp. 27-38.

Byrne, Patricia and Ducray, Kevin and Smyth, Bobby P (2016) The impact of sex upon needs and quality of life within a population on methadone treatment. Journal of Addiction Medicine , 10 , (1) , pp. 60-67.

Apantaku-Olajide, Tunde and Ducray, Kevin and Byrne, Patricia and Smyth, Bobby P (2012) Perception of unmet needs and association with benzodiazepine misuse among patients on a methadone maintenance treatment programme. The Psychiatrist , 36 , (5) , pp. 169-174.