title: Epidural blood patch does not prevent headache after lumbar puncture.
mesh_terms: D001769:Blood; D005069:Evaluation Studies as Topic; D006261:Headache / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D007268:Injections, Epidural; D013129:Spinal Puncture / Q000009:adverse effects*