Letter to the editor.
Simpson
Donald
D
D049673:History, 20th Century; D006801:Humans; D002532:Intracranial Aneurysm / Q000601:surgery; D009493:Neurosurgery / Q000266:history* / Q000295:instrumentation*; D013525:Surgical Instruments; D014656:Vascular Surgical Procedures / Q000295:instrumentation*