title: Lever pressing responses under a fixed-ratio schedule of mice with 6-hydroxydopamine-induced dopamine depletion in the nucleus accumbens.
authors.affiliation: Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan. tsutsui@sss.fukushima-u.ac.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Tsutsui
authors.forename: Kayo
authors.initials: K
authors.lastname: Nishizawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Kai
authors.forename: Kazuto
authors.initials: K
authors.lastname: Kobayashi