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. 2021 Mar 9;2021:baaa094. doi: 10.1093/database/baaa094

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© The Author(s) 2021. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — Classification and statistics of biomarkers. (a) Type of biomarkers; (b) usage distribution of biomarkers; (c) site distribution of biomarkers; (d) classification distribution of single molecular biomarkers in different sites.