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. 2014 Mar 14;9(3):e91977. doi: 10.1371/journal.pone.0091977

Figure 2. Core positive carbon sources in the healthy subjects and periodontitis patients.

Figure 2

Inner box (numbered with 1), positive carbon sources found in all subjects (100%); middle boxes (numbered with 2), present in 71–99% of subjects from each group (H: healthy, P: periodontitis); outer boxes (numbered with 3), present in 50–70% of subjects from the healthy and periodontitis groups; middle box (numbered with 4), positive carbon sources present in at least 50% of subjects in both the healthy and periodontitis groups.