- American Academy of Neurologywww.aan.com
- World Federation of Neurologywww.wfneurology.org
- National Institute of Neurological Disorders and Strokewww.ninds.nih.gov
- Centers for Disease Control and Preventionwww.cdc.gov
- MedlinePluswww.medlineplus.gov
- The International Classification of Headache Disorders – ICHD-3www.ichd-3.org
