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Molecular network analysis of UPLC-Q-TOF MS2 data. The networks were based on subgingival samples collected from the same periodontal pockets of 12 individuals before and after treatment. Individual MS2 features are highlighted on the basis of whether they were detected in samples collected before treatment, after treatment, or both. The Venn diagram indicates the numbers of features unique to before-treatment (blue) or after-treatment (purple) samples or common to both sets (orange).
