title: [Unruptured cerebral aneurysm study in Japan: method and registration status].
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged