GROSS: GASTROINTESTINAL: GI: ARTERY: CEREBRAL CIRCULATION; A=POSTERIOR COMMUNICATING ARTERY; B=BASILAR ARTERY; C=VERTEBRAL ARTERY
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GROSS: GASTROINTESTINAL: GI: ARTERY: CEREBRAL CIRCULATION; A=POSTERIOR COMMUNICATING ARTERY; B=BASILAR ARTERY; C=VERTEBRAL ARTERY