What else? Biopsy the barrier.
You're referring to the blood-brain barrier.
The brain doesn't have a lymph system. I know, all its garbage just gets caught in the snow fence by the side of the road.
The brain doesn't have a lymph system. I know, all its garbage just gets caught in the snow fence by the side of the road. [SEP] You're referring to the blood-brain barrier. [SEP] What else? Biopsy the barrier.