The differential contribution of muscle contraction and migraine symptoms to problem headache in the general population.
D000328:Adult; D005260:Female; D006261:Headache / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D009334:Neck Muscles / Q000503:physiopathology*; D012737:Sex Factors