Fig. 4From: Revealing oral microbiota composition and functionality associated with heavy cigarette smokingDifferentially abundant gene functions based on FNTD nicotine dependence score. Panel shows relative abundance of normalized counts for functional genes using SEED hierarchical categorization. All of the above comparison are significant. Smoking dependence, low, low to moderate, moderate, and high are colored in red, green, blue and pink, respectivelyBack to article page