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. Author manuscript; available in PMC: 2014 May 12.
Published in final edited form as: Alcohol Clin Exp Res. 2009 Sep 17;33(12):2103–2112. doi: 10.1111/j.1530-0277.2009.01050.x

Fig. 3.

Fig. 3

Dendrogram of interaction among education, OPRM1, and HTTLPR. The gray scale represents a continuum from Synergy to Redundancy. It ranges from black representing a high degree of synergy (positive information gain) to white representing the highest degree of redundancy (negative information gain).