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  Indian J Med Microbiol
 

Figure 2: (a) Multilevel hierarchical framework of biologic systems model; (b) A multilevel biologic systems model, representing pathogenesis of periodontitis (Reprinted from Kornman.[1] With copyright permission from John Wiley and sons.)

Figure 2: (a) Multilevel hierarchical framework of biologic systems model; (b) A multilevel biologic systems model, representing pathogenesis of periodontitis (Reprinted from Kornman.<sup>[1]</sup> With copyright permission from John Wiley and sons.)