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Taxonomic composition on order-level for all analysed toothbrushes grouped by period of use (<2 weeks (n = 6), 2–4 weeks (n = 6), 4–>12 weeks (n = 11)) and user age (10–20 years (n = 5), 20–60 years (n = 14), >60 years (n = 4)) based on NGS. For samples TB6 and TB7, the generation of amplicons failed and therefore these samples were not sequenced. Due to better presentation, only results ≥1% are given.
