Systemic and intra-dorsal periaqueductal gray injections of cholecystokinin sulfated octapeptide (CCK-8s) induce a panic-like response in rats submitted to the elevated T-maze - Zanoveli, Janaina Menezes; Ferreira Netto, Cristina; Guimarães, Francisco Silveira; Zangrossi Júnior, Hélio (Peptides, 2004)