Headache classification: status praesens.
Department of Neurology, Academic Hospital, State University Leiden, The Netherlands.
G W
GW
Bruyn
D006261:Headache / Q000145:classification* / Q000175:diagnosis; D006801:Humans; D009316:National Institutes of Health (U.S.); D009462:Neurology / Q000639:trends; D014481:United States