| Headache Classification Committee of the International Headache Society IHS | In: Harrison's Principles of Internal Medicine |
|---|---|
| For more information and source, see on this link : | For more information and source, see on this link : |
: The McGraw-Hill Companies; 2015.
| Cluster headache: Epidemiology, clinical features, and diagnosis | The international classification of headache disorders, 3rd edition |
|---|---|
| For more information and source, see on this link : | Cluster headache: Treatment and prognosis |
National Institute of Neurological Disorders and Stroke.
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