NMDS plot of the microbial 16S rRNA communities of subjects’ samples using a distance matrix calculated with the Yue and Clayton theta similarity coefficient.

<p>The plot of the two NMDS axes was generated using a distance matrix calculated at the 3% level, with the Yue and Clayton theta similarity coefficient within Mothur for all samples. The distance between two points is directly proportional to the Yue and Clayton theta similarity value for two samples such that sites positioned close together share a similar abundance in OTUs than samples further apart. NMDS stress = 0.52. Refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0062815#pone-0062815-g001" target="_blank">Figure 1</a> legend for sample labelling.