Pegylated leptin antagonist is a potent orexigenic agent: preparation and mechanism of activity - Elinav, E; Niv-Spector, L; Katz, M; Price, T O; Ali, M; Yacobovitz, M; Solomon, G; Reicher, S; Lynch, J L; Halpern, Z; Banks, W A; Gertler, A (Endocrinology, 2009)