Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12920-020-00748-3/MediaObjects/12920_2020_748_Fig6_HTML.png)
Hierarchical cluster analysis of differentially expressed miRNAs. a Heatmap clustering of the differentially expressed miRNAs significant among non-smokers vs. cigarette, smokers. b Heatmap clustering of the differentially expressed miRNAs significant among non-smokers vs. waterpipe smokers. c Heatmap clustering of the differentially expressed miRNAs significant among non-smokers vs. E-cigarette users. d Heatmap clustering of the differentially expressed miRNAs significant among non-smokers vs. dual smokers. The dendrogram shows clustering of pairwise comparisons among the different groups (non-smokers vs. cigarette smokers, non-smokers vs. waterpipe smokers, non-smokers vs. E-cigarette users and non-smokers vs. dual smokers)