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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