529 The hallucinogen psilocybin increases prepulse inhibition of the startle reflex in healthy humans - Euphrosyne Gouzoulis-Mayfrank; Karsten Heekeren; B. Thelen; Hiltrud Lindenblatt; K.-A. Kovar; H. Sass; M.A. Geyer (International Journal of Psychophysiology, 1998)