Sakai, F [Treatment of headache, especially chronic headache: a discussion]. [electronic resource] - Nihon Naika Gakkai zasshi. The Journal of the Japanese Society of Internal Medicine Apr 2001 - 659-76 p. digital Publication Type: Journal Article ISSN: 0021-5384 Subjects--Topical Terms: Acute DiseaseChronic DiseaseHeadache--diagnosisHumansMigraine Disorders--therapyTension-Type Headache--therapy