[Etiology and pathogenesis of so-called spontaneous basal subarachnoid hemorrhage].
D000328:Adult; D000368:Aged; D006801:Humans; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000209:etiology*
Etiologiia i patogenez tak nazyvaemykh spontannykh bazal'nykh subarakhnoidal'nykh krovoizliianii.