Chronic daily headache: a clinician's perspective.
Saper
Joel R
JR
Michigan Head Pain & Neurological Institute, Ann Arbor, MI 48104, USA.
D000700:Analgesics / Q000009:adverse effects; D002908:Chronic Disease; D020773:Headache Disorders / Q000209:etiology* / Q000523:psychology / Q000628:therapy; D006801:Humans; D008881:Migraine Disorders / Q000150:complications*
D000700:Analgesics