title: Bevel orientation and postdural puncture headache. A new possible explanation?
authors.forename: P J
authors.initials: PJ
authors.lastname: Zetlaoui
mesh_terms: D000775:Anesthesia, Spinal / Q000009:adverse effects* / Q000379:methods*; D006261:Headache / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D013129:Spinal Puncture / Q000009:adverse effects* / Q000379:methods*