Table 7 UMLS sources that are integrated into RTX-KG2.

UMLS semantic network

Anatomical therapeutic chemical classification system

ATC

DrugBank database

DRUGBANK

Foundational model of anatomy

FMA

Gene ontology

GO

Healthcare common procedure coding system

HCPCS

Human gene nomenclature committee

HGNC

Health level seven version 3.0

HL7V3.0

Human phenotype ontology

HPO

ICD-10 procedure coding system

ICD10PCS

ICD-9, clinical modification

ICD9CM

Logical observation identif. Names & Codes

LNC

Medication reference terminology

MED-RT

MEDLINE plus

MEDLINEPLUS

Medical subject headings (MeSH) [2]

MSH

Metathesaurus

MTH

NCBI taxon

NCBI

National cancer institute thesaurus

NCI

National drug data file

NDDF

National drug data file-reference terminology

NDFRT

Online Mendelian inheritance in man [120]

OMIM

Physician data query

PDQ

Psychological index terms

PSY

RxNorm (normalized drug names)

RXNORM

National drug file

VANDF