Headache classification prior to the Ad Hoc criteria.
Isler
H
H
Department of Neurology, University Hospital, Zürich, Switzerland.
D005060:Europe; D006261:Headache / Q000145:classification* / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans