Annotation results for abstracts of MEDLINE literature.

pmid_ontology.txt.
     First column represents the PMID of the literature of MEDLINE.
     Second column is IDs of terms of Disease Ontology (DO);
     Third column is IDs of terms of biological process category of Gene Ontology (GO);
     Fourth column is IDs of terms of cell component category of GO;
     Fifth column is IDs of terms of molecular function category of GO;
     Sixth column indicates data that creates the literature in MEDLINE.