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  Indian J Med Microbiol
 

Figure 1: Schematic diagram showing normal vertebrobasilar system and circle of Willis, where P1: P1 segment of posterior cerebral artery, P2: P2 segment of posterior cerebral artery

Figure 1: Schematic diagram showing normal vertebrobasilar system and circle of Willis, where P1: P1 segment of posterior cerebral artery, P2: P2 segment of posterior cerebral artery