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. 2019 Nov 11;2:109. doi: 10.1038/s41746-019-0185-y

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Fig. 2 — There are 4240 known urine metabolites in the human metabolome database (HMDB), 1424 of which have literature associations to a diverse set of human conditions. a Pie chart based on counts of HMDB chemical taxonomy (Super Class) for all metabolites identified in this study (n = 101). b Pie chart based on counts of each HMDB chemical taxonomy for metabolites all of HMDB. c Treemap of diseases, scaled by number of metabolites with literature associations