title: Epidural blood patch for postdural puncture headache: it's never too late.
mesh_terms: D001769:Blood; D002908:Chronic Disease; D004824:Epidural Space; D005260:Female; D006261:Headache / Q000209:etiology / Q000628:therapy*; D006801:Humans; D007267:Injections; D008875:Middle Aged; D009192:Myelography / Q000009:adverse effects; D013129:Spinal Puncture / Q000009:adverse effects*; D013997:Time Factors