title: Duration of postural headache after lumbar puncture: effect of needle size.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006261:Headache / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009339:Needles / Q000592:standards*; D011187:Posture; D013129:Spinal Puncture / Q000295:instrumentation*