Intraventricular Leptin Reduces Food Intake and Body Weight of Lean Rats but Not Obese Zucker Rats - Seeley, R J; van Dijk, G; Campfield, L A; Smith, F J; Burn, P; Nelligan, J A; Bell, S M; Baskin, D G; Woods, S C; Schwartz, M W (Hormone and Metabolic Research, 1996)