title: The concept of a conical spinal needle.
authors.forename: Y M
authors.initials: YM
authors.lastname: Salib
mesh_terms: D004867:Equipment Design; D006261:Headache / Q000209:etiology* / Q000517:prevention & control; D006801:Humans; D009339:Needles; D013129:Spinal Puncture / Q000009:adverse effects* / Q000295:instrumentation