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Influence of papaverine (10-8, 10-6 M), hypotension (moderate, severe), and prostaglandin E2 (PGE2; 1, 10 ng/mL) on pial artery diameter before and after fluid percussion injury in absence (vehicle) and presence of polyethylene glycol telomere B (PEG-TB; n=5–7). *p<0.05, compared with corresponding pre-injury value. +p<0.05, compared with corresponding vehicle value.
