P2‐156: EFFECTS OF LEPTIN ON HIPPOCAMPUS VOLUME AND COGNITIVE PERFORMANCE. (1st July 2006) - Huhn, Sebastian; Beyer, Frauke; Zhang, Rui; Lampe, Leonie; Luck, Tobias; Riedel-Heller, Steffi G.; Kratzsch, Jürgen; Schroeter, Matthias L.; Loeffler, Markus; Stumvoll, Michael; Villringer, Arno; Witte, A. Veronica