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Table 2 The number of potentially missing IS-A relations identified for sub-hierarchies

From: Detecting missing IS-A relations in the NCI Thesaurus using an enhanced hybrid approach

Sub-hierarchy # of Non-lattice subgraphs # of suggested missing IS-A relations
Disease, disorder or finding 8075 34
Experimental organism diagnosis 257 18
Drug, food, chemical or biomedical material 922 1
Molecular abnormality 143 1
Activity 109 1