Subarchnoid hemorrhage (SAH) of unknown cause is about 15 to 20% in SAH.

病因不明的蛛网膜下腔出血约占15 ~ 20%。

youdao

Subarchnoid hemorrhage (SAH) of unknown cause is about 15 to 20% in SAH.

病因不明的蛛网膜下腔出血约占15 ~ 20%。

youdao