Commentary: Headache in South America.
Del Brutto
Oscar H
OH
Department of Neurological Sciences, Hospital-Clínica Kennedy, Guayaquil (09-01) 3734, Ecuador. odbrutto@telconet.net
D020773:Headache Disorders / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D015994:Incidence; D013020:South America / Q000453:epidemiology