Cluster Home>Conditions_and_Diseases>Neurological_Disorders>Headaches>Cluster     Web Pages Cluster Headaches Worldwide Support Group Includes forum and cat room; medical articles and FAQs. Cluster Headache Help Resources, questionnaires and links for those affected with the disorder. Diagnosis of Cluster Headache Broad outlines on diagnostic criteria from the State University of New York. Cluster Headache Concise listing of clinical features and management. Cluster Headache FAQ Frequently Asked Questions from the Michigan Head Pain And Neurological Institute. Organization for Understanding Cluster Headaches Information about OUCH and its activities. Includes a quiz, medical information, comparison table and the International Headache Society diagnostic criteria.