Effects of acute and chronic treatment with hypericum perforatum L. (LI 160) on different anxiety-related responses in rats - Flausino Júnior, Otávio Aparecido; Zangrossi Júnior, Hélio; Salgado, João Vinícius; Viana, Milena de Barros (Pharmacology, Biochemistry and Behavior, 2002)