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. 2011 Dec 19;6(12):e29431. doi: 10.1371/journal.pone.0029431

Figure 2. Interaction entropy graphs.

Figure 2

The interaction model describes the percentage of the entropy (information gain) removed by each variable (main effect: represented by nodes) and by each pairwise combination of attributes (interaction effect: represented by connections). Attributes are selected on the basis of MDR results obtained in case of (A) Smokers and (B) Non smokers. Labels: Ex3: EPHX1 Tyr113His, Alc: alcohol consumption, Tbc: Tobacco chewing, SULT: SULT1A1 Arg213His, 2A: CYP1A1*2A, 2C: CYP1A1*2C, P1: GSTP1 Ile105Val.