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No evidence of association between 118A>G OPRM1 polymorphism and heroin dependence in a large Bulgarian case-control sample.
Nikolov MA, Beltcheva O, Galabova A, Ljubenova A, Jankova E, Gergov G, Russev AA, Lynskey MT, Nelson EC, Nesheva E, Krasteva D, Lazarov P, Mitev VI, Kremensky IM, Kaneva RP, Todorov AA. Nikolov MA, et al. Among authors: gergov g. Drug Alcohol Depend. 2011 Aug 1;117(1):62-5. doi: 10.1016/j.drugalcdep.2010.12.026. Epub 2011 Jan 31. Drug Alcohol Depend. 2011. PMID: 21277709 Free PMC article.