GARD collects data from a variety of sources to populate its website and provide accurate and reliable information on rare diseases. 

GARD uses data collected from Orphanet and Online Mendelian Inheritance in Man (OMIM)  to interpret and provide information on rare diseases. This includes names, synonyms, genes, symptom frequency, population estimates and more.

• Orphanet is an online database of rare diseases and orphan drugs that provides aggregated data  coordinated by INSERM-US14 in Paris.
• OMIM is a database of human genes and genetic phenotypes authored and edited at the McKusick-Nathans Institute of Genetic Medicine , Johns Hopkins University School of Medicine.

GARD uses Human Phenotype Ontology (HPO)  for standard terminology to represent a disease's phenotypic and clinical features. 

• Download ontology from HPO
• Learn more about HPO

GARD uses information gathered from the National Center for Biotechnology Information's MedGen to help in explaining genetic and rare diseases.

• Download MedGen Data and FTP

GARD uses the National Library of Medicine for a variety of resources on health information.

• Learn about the Newborn Screening Coding and Terminology Guide
• Find health information from MedlinePlus
• Learn about the Unified Medical Language System

GARD uses additional resources when developing content. 

• Review details of "Improving Diagnosis in Health Care"
• Learn about practices GARD follows when developing easy-to-understand content