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. 2021 Mar 3;16:25. doi: 10.1186/s13020-021-00427-0

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© The Author(s) 2021

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Fig. 2 — Distribution rules of herbs from the 24 recommended Traditional Chinese medicine (TCM) prescriptions. a The top 20 most commonly used traditional herbs from the 24 recommended TCM prescriptions. b 16 rules for only two herbs. The larger the circle between the two herbs, the higher the confidence level, the darker the color, and the higher the lift value