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Genetic variants in chromosome 15 associated with nicotine dependence. (A) Architecture of the genetic variants in chromosome 15q25. (B) Linkage disequilibrium between the genetic variation within the 15q25.1 locus associated with nicotine dependence in Northern Europeans from Utah (CEU) population. The color intensity indicates LD levels among variants. Using the LDlink tool from the National Institutes of Health.
