title: What makes a specialist a specialist?
authors: P K
authors: PK
authors: Hamilton
mesh_terms: D051270:Headache Disorders, Primary / Q000209:etiology*; D006801:Humans; D008297:Male; D010818:Practice Patterns, Physicians'; D013129:Spinal Puncture; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed